1-step Magento Cart

I have a Magento store with around 51 products, most configurable, with some changes. All code should be done so that upgrading magento will not break it, if possible, and please provide a list of every file altered/created. If you're not sure about something, please ask before you bid. --- Magento one-step cart: - make it a one-step cart/checkout, without expandable/hidden options; [ ie. remove steps 2,3,4 so there is only one button to press on checkout page (only checkout option is paypal and shipping is one option so these can be hidden) - shipping set to 'free shipping' (if order $125+) else 'table rate-by-weight' - 'continue' should say 'Checkout' ] - at bottom of cart table, show correct shipping total instead of current 0.00 hard-coding - Total should show (total + shipping) - only javascript should be ajax functionality on 'checkout' button, which checks for missing/incorrect required fields and posts form. - cart shouldn't need javascript to proceed, so ajax button should also have fallback so it works without javascript (ie. a regular form directing to a script that does the same as the ajax call) - when logged in, if a pre-saved address is used, there is currently an error that needs fixing (problem seems to be in [login to view URL]) - the javascript should be done in a single file, generated by php (this already exists and works, you just need to add code to that file) - there should be no other javascript files called (eg. currently is the magento mixup of js files) - javascript should be done with jQuery, not current Prototype (again, only javascript should be for ajax form validation and submitting, cookies (maybe?), [+ google analytics, already coded in]) - in [login to view URL] is a banner showing 'free shipping if spend $x+'. This should only show if 'free shipping if over $x' is set in the CP. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform magento running on shared lamp server should work on ie6+, saf 3+. ff3+