Has anyone ever done this - I'm looking to add a custom Product image field, so I can add product thumbnails to each product (and no, adding an img tag into the description field won't cut it, as I need to restructure the output on the signup form a little differently, and the image needs to be outside of the description text/block). Can this be done via site.php file somehow without editing the core files? And adding this, will it show on the signup form too? Anyone? Alex?