Oscommerce PHP experts!

We have an commerce store that need to be edit. Its 1 store we want to convert to a mall with multi-stores, 1 database and every store "see's its own database" - A store ID need to be added to the Database and All queries has to change accordingly - on the store and at the admin. 1. We wish to have a common login between that and other oscommerce stores (only username and password, still keep differant db) and ask the user if he wishes to use the existing one. 2. We want to see the checkout process in a single page. 3. We want to let the customers the ability to set time for delivery. (Max 1 week from order date) 4. We want to the admin panel to have an addition the the configuration page also details like - css style, create account text, forgot password text, order summery text, Our stores have actual opening and closed hours, we wish to have the ability to set them up there, (will trigger store close page accordingly) couple more customized variable. [login to view URL] the admin panel under edit product, we currently have "Ajax attribute manager" we want to add attribute sort order option and be able to choose check box/select/text. 6. Fix a minor visual problem with a text attributes and select default option. 7. Set up a verification phone call. 8. Install rewards and points modules. (The installation is ready and can be download with the instructions) [login to view URL] delivery area by address (google api) 10. We want to clean up the unused files. We want to enhance that NO DESIGN work needed what so ever this job it is pure coding. You will provide with access to the server and we can answer any question about the code, DB or any clarification that may required