Put the text "Part #" infront of model # on product_listing.php

If you don't like the default way that Zen Cart 1.3.8a displays model #'s in the product listing page.. You can edit your override version of

includes/modules/classic/product_listing.php

Mine's all hacked up with mods like the Column Grid Layout mod, so I'm not sure that the line #' will help you here.. I'm talking about line 135, but for best measure you should preform a search for "products_model"

//BOF Edward Custom
		$lc_text = "Part #:".$listing->fields['products_model']."<br>";
//EOF Edward Custom

All I did was add the "Part #:" and the ."<br>"

This way it actally displays the text Part #, instead of just throwing up some part#'s without a label that could be confusing.