Assign Joomla module to product pages?

Is there some way i can assign a couple of joomla modules (cart, newsletter sign up form) to all of my product detail pages? Not under the product but rather in a module position to the side of the product display (in the sidebar position)? I either need to figure out how to do this
OR
Is there a way to change the targeted url of the product images you click on? rather then it taking you to the default product page can i redirect it to my own custom product page?

The first is only possible by editing your template's index.php file in order to display the position of your modules only on the product details page. The modification is not be possible for some templates and depends on how your template is made. So in that case, you should ask your template provider.

The URL is generated at the beginning of the item box layout file. You can edit the file "listing_img_title" of the "product" view via the menu Display->Views in order to change the links.