Groupon Clone Script Modification

I just need simple modification on the existing script I have: 1. Additional Payment Modules: - module to add major credit card processing such 2checkout and ability to payment gateways for future use. -I'm looking for something that we could just add our merchant ID and other information needed, ex. API. [login to view URL] Credits: - ability for the user to store (or deposit credits) to their account via credit card and manually (bank wire- admin will verify and approve if deposit is done) and use the credited amount to pay the coupon. - using the stored credit, naturally the amount used to buy the coupon should be deducted from the stored credit. - user have an OPTION to pay via their stored credit or other payment gateway. 3. Profile User modification: -ability to change change passwords -add security question -ability to store credit card information I'm looking for a dependable provider.