Payment option based on new option

Hello,

My plan is to add a new field to the customer database called Zone.

The zone will either be 1 or 2

What I need is to figure out how to display a specific payment module based on what the customers zone is. Pretty much if they are in zone 1 I need to display CCmodule1, otherwise I need to display CCmodule 2

Reason is it depends on which zone they are in as to which credit card processor the money should go to. Currently my client is using the Linkpoint1 API payment module. My plan was to duplicate that and install a second one and enter the different account number. Then based on their zone the correct payment module will display.

Any help would be appreciated.