OS Commerce feature additions and design

Need to add some custom admin functions to an oscommerce site. Need to be able to do the following: 1. Easily edit the Shipping & Returns, Privacy, Contact us pages in a WSIWYG editor. 2. Easily change the home logo and banner on the front page. 3. Easily edit the category headings at the top of each page when you click on a category. 4) easily Upload csv to update products cost and sale price 5) selling price module where selling price can be calculated automatically by percent off retail Price or guaranteed marging on cost or a combination of both. 6) design 2 templates which are easily changable from admin section of the script and the banner and logo there can be changed as well from admin section. 7) install featured products mod, quantity break mod, cross selling mod, paypal mod, protx payment mod and a few others and connect it to the script. 8) change the admin panel of the script making it more user friendly. 9) Change the default currency to British pounds so the first currency that the user sees is £ and not $ 10) adjust image size in the script so images are proportionate and not stretched out. 11) Optimisation for search engine - SEO please note the following: 1) We require turn key solution 2) No advances, no deposits - payment on 100% completion & testing 3) No bids from users who have feedback score of 10 or less 4) bids without PM will be ignored due to generic bidders 5) bidders must complete within specified period - no grace time given in any case.