Is it difficult to implement an external payment gateway?

[T.J.]

I?m concerning to implement a Swedish payment gateway called Paynova (http://www.paynova.com/eng/?ICP=) because we are going to promote one product for the Swedish market.

 

Because I got all the information from them, I?m wondering if there is some contribution that I must use, or is there a ?plug?n play? possibility already integrated in OScommerce?

 

I would appreciate any guidance or tip.

 

Thank you!

 

Regards,

T.J.