osCommerce - get multiple versions of the website working on various subfolders with new home page

I have a ready and running osCommerce website. For the purposes of different pricing options and product offerings for different countries, I would like to do the following: 1. Create a different subfolder for each country: example: USA Store: [login to view URL] Canada Store:? [login to view URL] UK Store:? [login to view URL] Australia Store:? [login to view URL] and so on... The websites will all have their own independent database, different from each other. They will have their own respective currencies. There should be a warning for the users during login, making them aware that the logins are country based. 2. The main home page should let people choose their delivery country: I have already got the page HTML ready, may need some tweaking. 3. All other details country-specific details need to be changed. 4. I already have most of this done. The problem I am facing is probably related to some cookie issues or some code conflict as the shopping cart cannot add products in one of most of the browsers. I need this website working on all browsers (IE, FireFox, Chrome, Safari on both a PC and a Mac) 5. Documentation: I need step-by-step instructions, if I need to add a new country myself in the future.