Integrate payment processors

Hello,

I am interested in buying a Fiverr clone and i think it is written in .php. My problem is that it has Paypal as the only payment processor as i have no intention in dealing with them..

I am interested in adding 2checkout at the moment.

Would that be easy to integrate? Are there any ready made .php scripts to do that kind of work?

Im thinking of buying the program and doing the integration myself as i guess they will charge me alot for doing such an integration.

Thanx in advance