OSCOMMERCE for t-shirts

i need the following changes for this oscommerce cloth store: 1.--when the user is logged in and hit the "SUBMIT YOUR DESIGN" button, an upload form appear and the user can upload an image to the existing categories(maybe you can make an access to the admin menu, but only limited access) 2.--remove all unused images from the site 3.--replace all default catalog images with some others (p.ex. from the congratulations page) 4.--some bugs to be fixed alt on "DETAILS" button, is "BUY NOW" not "details" 5.--place t-shirt sizing (menu)(YS, YM, YL, YXL, S, M, L, XL, XXL, 3XL)