Oscommerce Checkout Modification

I had this project listed, but don't feel it was clear. I would like to modify my oscommerce checkout to have payment, shipping and shopping cart all on the same page. This is a good example - [login to view URL],3359/category,3/search,checkout/page,5 I need to use the default core language files, since I am using multiple languages, that way I don't need to translate anything. I would also like the option of creating an account or for this to be compatible with the purchase without account mod. I am also using STS. Please PM with any questions.