1) Did you look at the included robots.txt example, that should get rid of pop up images appearing google etc

User-agent: *
Disallow: /cgi-bin/
Disallow: /*zenid=
Disallow: /index.php?main_page=popup_image*
2) Pages like the login page, have the noindex tag on them by default to stop them being indexed, or at least all that i have seen have

This is a very old one from someone somewhere, you may be able to chop useful bits out of it

User-agent: Googlebot
Disallow: /*&action=notify$
Disallow: /*&number_of_uploads=0&action=notify
Disallow: /index.php?main_page=discount_coupon
Disallow: /index.php?main_page=checkout_shipping
Disallow: /index.php?main_page=shippinginfo
Disallow: /index.php?main_page=privacy
Disallow: /index.php?main_page=conditions
Disallow: /index.php?main_page=contact_us
Disallow: /index.php?main_page=advanced_search
Disallow: /index.php?main_page=login
Disallow: /index.php?main_page=unsubscribe
Disallow: /index.php?main_page=shopping_cart
Disallow: /index.php?main_page=product_reviews_write&cPath=*
Disallow: /index.php?main_page=tell_a_friend&products_id=*
Disallow: /index.php?main_page=product_reviews_write&products_id=*
Disallow: /index.php?main_page=popup_shipping_estimator
Disallow: /index.php?main_page=account
Disallow: /index.php?main_page=password_forgotten
Disallow: /index.php?main_page=checkout_shipping_address
Disallow: /index.php?main_page=logoff
Disallow: /index.php?main_page=gv_faq
Disallow: /gv_faq.html?faq_item=*
Disallow: /*&sort=*
Disallow: /*alpha_filter_id=*
Disallow: /*&disp_order=*

User-agent: Slurp
Disallow: /*&action=notify$
Disallow: /*&number_of_uploads=0&action=notify
Disallow: /index.php?main_page=discount_coupon
Disallow: /index.php?main_page=checkout_shipping
Disallow: /index.php?main_page=shippinginfo
Disallow: /index.php?main_page=privacy
Disallow: /index.php?main_page=conditions
Disallow: /index.php?main_page=contact_us
Disallow: /index.php?main_page=advanced_search
Disallow: /index.php?main_page=login
Disallow: /index.php?main_page=unsubscribe
Disallow: /index.php?main_page=shopping_cart
Disallow: /index.php?main_page=product_reviews_write&cPath=*
Disallow: /index.php?main_page=tell_a_friend&products_id=*
Disallow: /index.php?main_page=product_reviews_write&products_id=*
Disallow: /index.php?main_page=popup_shipping_estimator
Disallow: /index.php?main_page=account
Disallow: /index.php?main_page=password_forgotten
Disallow: /index.php?main_page=checkout_shipping_address
Disallow: /index.php?main_page=logoff
Disallow: /index.php?main_page=gv_faq
Disallow: /gv_faq.html?faq_item=*
Disallow: /*&sort=*
Disallow: /*alpha_filter_id=*
Disallow: /*&disp_order=*

User-agent: *
Disallow: /index.php?main_page=faqs_new
Disallow: /index.php?main_page=discount_coupon
Disallow: /index.php?main_page=checkout_shipping
Disallow: /index.php?main_page=shippinginfo
Disallow: /index.php?main_page=privacy
Disallow: /index.php?main_page=conditions
Disallow: /index.php?main_page=contact_us
Disallow: /index.php?main_page=advanced_search
Disallow: /index.php?main_page=login
Disallow: /index.php?main_page=unsubscribe
Disallow: /index.php?main_page=shopping_cart
Disallow: /index.php?main_page=popup_shipping_estimator
Disallow: /index.php?main_page=account
Disallow: /index.php?main_page=password_forgotten
Disallow: /index.php?main_page=checkout_shipping_address
Disallow: /index.php?main_page=logoff
Disallow: /index.php?main_page=gv_faq
Disallow: /gv_faq.html?faq_item=1
Disallow: /gv_faq.html?faq_item=2
Disallow: /gv_faq.html?faq_item=3
Disallow: /gv_faq.html?faq_item=4
Disallow: /gv_faq.html?faq_item=5