Ccavenue integration?

I have been successfully using ccavenue with zen cart at http://bookstore.sriramanamaharshi.org Now I have to move to a different server t http:bookstore.ramanaguru.org When I asked ccavenue for an integration kit they provided me a bunch of files. Previously there were only two php files to be uploaded appropriate folders in zen cart. Now I am not sure how to do the integration. Any help would be appreciated. Di I need to hire a developer? If so I will do so. Please help. I would also welcome suggestions for other payment gateways that can replace ccavenue which include netbanking in India. :dontgetit