So, so far i have made it so that dvd type shows up in the configure options, and the proper fields export on to the spreadsheet. the ONLY thing i can't quite get to work is the import. I don't know how much you feel like combing through code, but this is what i have modified: (from record_companies and music_genre)

Code:
// HERE ==========================>
		// BEGIN: studios
		if (isset($filelayout['v_studios_name']) ) {
			if ( isset($v_studios_name) && ($v_studios_name != '') && (mb_strlen($v_studios_name) <= $studio_name_max_len) ) {
				$sql = "SELECT studios_id AS studiosID FROM ".TABLE_STUDIOS." WHERE studios_name = '".addslashes(ep_4_curly_quotes($v_studios_name))."' LIMIT 1";
				$result = ep_4_query($sql);
				if ( $row = mysql_fetch_array($result) ) {
					$v_studios_id = $row['studiosID']; // this id goes into the product_dvd_extra table
					$sql = "UPDATE ".TABLE_STUDIOS." SET 
						studios_image = '".addslashes($v_studios_image)."',
						last_modified = CURRENT_TIMESTAMP
						WHERE studios_id = '".$v_studios_id."'";
					$result = ep_4_query($sql);
					foreach ($langcode as $lang) {
						$l_id = $lang['id'];
						$sql = "UPDATE ".TABLE_STUDIOS_INFO." SET
							studios_url = '".addslashes($items[$filelayout['v_studios_url_'.$lid]])."'
							WHERE studios_id = '".$v_studios_id."' AND languages_id = '".$lid."'"; 
						$result = ep_4_query($sql);
					}
				} else { // It is set to autoincrement, do not need to fetch max id
					$sql = "INSERT INTO ".TABLE_STUDIOS." (studios_name, studios_image, date_added, last_modified)
						VALUES ('".addslashes(ep_4_curly_quotes($v_studios_name))."', '".addslashes($v_studios_image)."', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)";
					$result = ep_4_query($sql);
					$v_studios_id = mysql_insert_id(); // id is auto_increment, so can use this function
					foreach ($langcode as $lang) {
						$l_id = $lang['id'];
						$sql = "INSERT INTO ".TABLE_STUDIOS_INFO." (studios_id, languages_id, studios_url)
							VALUES ('".addslashes($v_studios_id)."',".(int)$l_id.",'".addslashes($items[$filelayout['v_studios_url_'.$lid]])."')"; // seems we are skipping manufacturers url
						$result = ep_4_query($sql);
					}
				}
			} else { // $v_studios_name == '' or name length violation
				if (mb_strlen($v_studios_name) > $studio_name_max_len) {
					$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_STUDIOS_NAME_LONG, $v_studios_name, $studio_name_max_len);
					$ep_error_count++;
					continue;
				}
				$v_studios_id = 0; // studios_id = '0' for no assigned artists
			}
		}
		// END: studios

// HERE ==========================>
		// BEGIN: dvd_genre
		if (isset($filelayout['v_dvd_genre_name']) ) {
			if ( isset($v_dvd_genre_name) && ($v_dvd_genre_name != '') && (mb_strlen($v_dvd_genre_name) <= $dvd_genre_name_max_len) ) {
				$sql = "SELECT dvd_genre_id AS dvd_genreID FROM ".TABLE_DVD_GENRE." WHERE dvd_genre_name = '".addslashes($v_dvd_genre_name)."' LIMIT 1";
				$result = ep_4_query($sql);
				if ( $row = mysql_fetch_array($result) ) {
					$v_dvd_genre_id = $row['dvd_genreID']; // this id goes into the product_dvd_extra table
				} else { // It is set to autoincrement, do not need to fetch max id
					$sql = "INSERT INTO ".TABLE_DVD_GENRE." (dvd_genre_name, date_added, last_modified)
						VALUES ('".addslashes($v_dvd_genre_name)."', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)";
					$result = ep_4_query($sql);
					$v_dvd_genre_id = mysql_insert_id(); // id is auto_increment
				}
			} else { // $v_dvd_genre_name == '' or name length violation
				if (mb_strlen($v_dvd_genre_name) > $dvd_genre_name_max_len) {
					$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_DVD_GENRE_NAME_LONG, $v_dvd_genre_name, $dvd_genre_name_max_len);
					$ep_error_count++;
					continue;
				}
				$v_dvd_genre_id = 0; // chadd - zencart uses genre_id = '0' for no assigned artists
			}
		}
		// END: dvd_genre	
		
		
		
		// insert new, or update existing, product
		if ($v_products_model != "") { // products_model exists!
			// First we check to see if this is a product in the current db.
			$result = ep_4_query("SELECT products_id FROM ".TABLE_PRODUCTS." WHERE (products_model = '".addslashes($v_products_model)."') LIMIT 1");
			if (mysql_num_rows($result) == 0)  { // new item, insert into products
				$v_date_added	= ($v_date_added == 'NULL') ? CURRENT_TIMESTAMP : $v_date_added;
				$sql			= "SHOW TABLE STATUS LIKE '".TABLE_PRODUCTS."'";
				$result			= ep_4_query($sql);
				$row			= mysql_fetch_array($result);
				$max_product_id = $row['Auto_increment'];
				if (!is_numeric($max_product_id) ) {
					$max_product_id = 1;
				}
				$v_products_id = $max_product_id;
				if ($v_studios_name <> '') {
					$v_products_type = 6; // 6 = dvd
				} else {
					$v_products_type = 1; // 1 = standard product
				}	
				
				$query = "INSERT INTO ".TABLE_PRODUCTS." SET
					products_model					= '".addslashes($v_products_model)."',
					products_type     		        = '".(int)$v_products_type."',
					products_price					= '".$v_products_price."',";
				if ($ep_supported_mods['uom'] == true) { // price UOM mod
					$query .= "products_price_uom = '".$v_products_price_uom."',"; 
				}
				if ($ep_supported_mods['upc'] == true) { // UPC Code mod
					$query .= "products_upc = '".addslashes($v_products_upc)."',";
				}
				if ($ep_supported_mods['gpc'] == true) { // Google Product Category for Google Merhcant Center - chadd 10-1-2011
					$query .= "products_gpc = '".addslashes($v_products_gpc)."',";
				}
				if ($ep_supported_mods['msrp'] == true) { // Manufacturer's Suggested Retail Price
					$query .= "products_msrp = '".$v_products_msrp."',";
				}
				if ($ep_supported_mods['gppi'] == true) { // Group Pricing Per Item
					$query .= "products_group_a_price = '".$v_products_group_a_price."',";
					$query .= "products_group_b_price = '".$v_products_group_b_price."',";
					$query .= "products_group_c_price = '".$v_products_group_c_price."',";
					$query .= "products_group_d_price = '".$v_products_group_d_price."',";
				}
				if ($ep_supported_mods['excl'] == true) { // Exclusive Product custom mod
					$query .= "products_exclusive = '".addslashes($v_products_exclusive)."',";
				}
				if (count($custom_fields) > 0) {
					foreach ($custom_fields as $field) {
						$value ='v_'.$field;
						$query .= "$field = '".addslashes($$value)."',";
					}
				}
				$query .= "products_image			= '".addslashes($v_products_image)."',
					products_weight					= '".$v_products_weight."',
					products_discount_type          = '".$v_products_discount_type."',
					products_discount_type_from     = '".$v_products_discount_type_from."',
					product_is_call                 = '".$v_product_is_call."',
					products_sort_order             = '".$v_products_sort_order."',
					products_quantity_order_min     = '".$v_products_quantity_order_min."',
					products_quantity_order_units   = '".$v_products_quantity_order_units."',
					products_priced_by_attribute	= '".$v_products_priced_by_attribute."',
					product_is_always_free_shipping	= '".$v_product_is_always_free_shipping."',
					products_tax_class_id			= '".$v_tax_class_id."',
					products_date_available			= $v_date_avail, 
					products_date_added				= $v_date_added,
					products_last_modified			= CURRENT_TIMESTAMP,
					products_quantity				= '".$v_products_quantity."',
					master_categories_id			= '".$v_categories_id."',
					manufacturers_id				= '".$v_manufacturers_id."',
					products_status					= '".$v_db_status."',
					metatags_title_status			= '".$v_metatags_title_status."',
					metatags_products_name_status	= '".$v_metatags_products_name_status."',
					metatags_model_status			= '".$v_metatags_model_status."',
					metatags_price_status			= '".$v_metatags_price_status."',
					metatags_title_tagline_status	= '".$v_metatags_title_tagline_status."'";	

				$result = ep_4_query($query);
				if ($result == true) {
					// need to change to an log file, this is gobbling up memory! chadd 11-14-2011
					if ($ep_feedback == true) {
						$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_NEW_PRODUCT, $v_products_model);
					}
					$ep_import_count++;
					// PRODUCT_DVD_EXTRA
					if ($v_products_type == '6') {
						$sql_dvd_extra = ep_4_query("SELECT * FROM ".TABLE_PRODUCT_DVD_EXTRA." WHERE (products_id = '".$v_products_id."') LIMIT 1");
						if (mysql_num_rows($sql_dvd_extra) == 0)  { // new item, insert into products
							$query = "INSERT INTO ".TABLE_PRODUCT_DVD_EXTRA." SET
								products_id			= '".$v_products_id."',
								studios_id	= '".$v_studios_id."',
								dvd_genre_id		= '".$v_dvd_genre_id."'";
							$result = ep_4_query($query);
						}				
					}
				} else {
					$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_NEW_PRODUCT_FAIL, $v_products_model);
					$ep_error_count++;
					continue; // new categories however have been created by now... Adding into product table needs to be 1st action?
									}
				// needs to go into log file chadd 11-14-2011
				if ($ep_feedback == true) {
					foreach ($items as $col => $summary) {
						if ($col == $filelayout['v_products_model']) continue;
						$display_output .= print_el_4($summary);
					}
				}
			} else { // existing product, get the id from the query and update the product data
				// if date added is null, let's keep the existing date in db..
				$v_date_added = ($v_date_added == 'NULL') ? $row['v_date_added'] : $v_date_added; // if NULL, use date in db
				$v_date_added = zen_not_null($v_date_added) ? $v_date_added : CURRENT_TIMESTAMP; // if updating, but date added is null, we use today's date
				$row = mysql_fetch_array($result);
				$v_products_id = $row['products_id'];
				$row = mysql_fetch_array($result); 
				// CHADD - why is master_categories_id not being set on update???
				$query = "UPDATE ".TABLE_PRODUCTS." SET
					products_price = '".$v_products_price."',";
				if ($ep_supported_mods['uom'] == true) { // price UOM mod
					$query .= "products_price_uom = '".$v_products_price_uom."',"; 
				}
				if ($ep_supported_mods['upc'] == true) { // UPC Code mod
					$query .= "products_upc = '".addslashes($v_products_upc)."',";
				}
				if ($ep_supported_mods['gpc'] == true) { // Google Product Category for Google Merhcant Center - chadd 10-1-2011
					$query .= "products_gpc = '".addslashes($v_products_gpc)."',";
				}
				if ($ep_supported_mods['msrp'] == true) { // Manufacturer's Suggested Retail Price
					$query .= "products_msrp = '".$v_products_msrp."',";
				}
				if ($ep_supported_mods['gppi'] == true) { // Group Pricing Per Item
					$query .= "products_group_a_price = '".$v_products_group_a_price."',";
					$query .= "products_group_b_price = '".$v_products_group_b_price."',";
					$query .= "products_group_c_price = '".$v_products_group_c_price."',";
					$query .= "products_group_d_price = '".$v_products_group_d_price."',";
				}
				if ($ep_supported_mods['excl'] == true) { // Exclusive Products custom mod
					$query .= "products_exclusive = '".addslashes($v_products_exclusive)."',";
				}
				if (count($custom_fields) > 0) {
					foreach ($custom_fields as $field) {
						$value ='v_'.$field;
						$query .= "$field = '".addslashes($$value)."',";
					}
				}
				$query .= "products_image			= '".addslashes($v_products_image)."',
					products_weight					= '".$v_products_weight."',
					products_discount_type			= '".$v_products_discount_type."',
					products_discount_type_from		= '".$v_products_discount_type_from."',
					product_is_call					= '".$v_product_is_call."',
					products_sort_order				= '".$v_products_sort_order."',
					products_quantity_order_min		= '".$v_products_quantity_order_min."',
					products_quantity_order_units	= '".$v_products_quantity_order_units."',
					products_priced_by_attribute	= '".$v_products_priced_by_attribute."',
					product_is_always_free_shipping	= '".$v_product_is_always_free_shipping."',
					products_tax_class_id			= '".$v_tax_class_id."',
					products_date_available			= $v_date_avail,
					products_date_added				= $v_date_added,
					products_last_modified			= CURRENT_TIMESTAMP,
					products_quantity				= '".$v_products_quantity."',
					manufacturers_id				= '".$v_manufacturers_id."',
					products_status					= '".$v_db_status."',
					metatags_title_status			= '".$v_metatags_title_status."',
					metatags_products_name_status	= '".$v_metatags_products_name_status."',
					metatags_model_status			= '".$v_metatags_model_status."',
					metatags_price_status			= '".$v_metatags_price_status."',
					metatags_title_tagline_status	= '".$v_metatags_title_tagline_status."'".
					" WHERE (products_id = '".$v_products_id."')";
				
				$result = ep_4_query($query);
				if ($result == true) {
					// needs to go into a log file chadd 11-14-2011
					if ($ep_feedback == true) {
					$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_UPDATE_PRODUCT, $v_products_model);
						foreach ($items as $col => $summary) {
							if ($col == $filelayout['v_products_model']) continue;
							$display_output .= print_el_4($summary);
						}
					}				
					// PRODUCT_DVD_EXTRA
					if ($v_products_type == '6') {
						$sql_dvd_extra = ep_4_query("SELECT * FROM ".TABLE_PRODUCT_DVD_EXTRA." WHERE (products_id = '".$v_products_id."') LIMIT 1");
						if (mysql_num_rows($sql_dvd_extra) == 1)  { // update
							$query = "UPDATE ".TABLE_PRODUCT_DVD_EXTRA." SET
								studios_id	= '".$v_studios_id."',
								dvd_genre_id		= '".$v_dvd_genre_id."' 
								WHERE products_id   = '".$v_products_id."'";
							$result = ep_4_query($query);
						}				
					}					
					$ep_update_count++;				
				} else {
					$display_output .= sprintf(EASYPOPULATE_4_DISPLAY_RESULT_UPDATE_PRODUCT_FAIL, $v_products_model);
					$ep_error_count++;
				}
			}