440038 oscommerce online shop upgrade

I am running online shop based on oscommerce. I need to upgrade some functions. If you can not do all of them, let me know which part you can do and quote it for me. 1. fix newsletter( at the moment it does not work properly.) it must come with unsubscribe function. Please let me know traffic limit due to some web host limitation. 2. For credit card payment, we are using eway.com.au. They have Geo-IP anti fraud function, but I can not set up properly. Set it up or get same functions. 3. Datafeed generation file got trouble. Original I put same product in different category, but datafeed only recognize one category. After I deleted one category, program still can not generate correct datafeed. same product still is missing. I think there are some other products are in same situation. Please fix [login to view URL] better solution is generate whole data include both categories. 4. Upgrade my current oscommerce 2.2 to 3.0. I found version 3.0 includes quite good functions, but the upgrade tool still pending. If you can do it for me, please quote.