Customization on WordPress Theme (Wp e-commerce plugin

Customization on WordPress Theme and add Wp e-commerce plugin. This project is to create a website that let user download free website background pattern, and to sell website background pattern source file. Payment gateway ideally is to use PayPal. [HOME page] 1. Preferable use this theme: [login to view URL] . PSD design was ready, so no need design job. PSD files would be given (in adobe photoshop CS4 format). 2. Homepage is content (or products) pages. But i need some customization on homepage. Please see this home page ([login to view URL]). The products on home page should same as 'bookcase', and when click on it, the pictures will expand, and show further details. Details includes: Title, Category list, Tag list, Permalink, published date, like button, comment, "BUY NOW", "PREVIEW", "DOWNLOAD" button. Some of the products should show in gallery format. When the pictures expand, the system should auto repeat the pattern (in -x and -y). 3. "Preview Button": Let say one post have 5 pattern (same pattern, just different color). So this post should display those patterns in gallery format. If user click on the preview button, it should be auto refresh and preview with the new chosen pattern. If possible each pattern should have chance to let user preview it. 4. Content (or products) should be filter/ search by Category or tag (Multi-filter)**Please advice whether this can be done or not**. A "reset" button somewhere around (to removed previous searched results). A title to show what those options had been choose (Example: Search results for Blue/ Vector/ Bird). 5. Indicate below items by small icon somewhere around the post: - "Newest Post" - "Editor Choice" - "Top 10 Download" - "Top 10 Seller" 6. Add Facebook "like" and Google "+Plus" on homepage left sidebar. 7. On top right now have a "Plus" button, i would like to remain all these. But the "Plus" button and content can move to bottom? (pleasee see this example: [login to view URL]) The design please change exactly same with 'bookcase' footer. 8. The top "Plus" button please change to "Shopping cart" button. When click on it, it should drop down and show the summary shopping list. Of course will have a "check-out" button to jump to "Check-out" full page. 9. With "Load more" button on bottom to show more post. [Others] 10. Able to backup and restore all the pictures, products, info, etc. [Widget] 11. Please prepared below widget (to put at left sidebar or on footer there): - Tag - Top 10 Download (with 'see all' button) - Top 10 Paid (with 'see all' button) - Newest Post - a html column - Featured Post / Editor Choice (with 'see all' button) - Google Adsense column - Twitter update - facebook fans [Shopping cart] 12. Please get some ideas from this: the design and function is good. When click check-out, the way the page move to next page is cool, please do the same. ([login to view URL]) Kindly refer to attached design. The visual about 90% done. Please let me know if you have any doubt about this projects. Thanks!