Hello,
I can see some incompatibility with my affiliate system, which is working with "buy now" button by PayPal only ... Can I integrate this into the form from you in any way ...? I know it is nonsense a little bit, but ... Thanks.
I am sorry but I am not sure if it is possible or not. I don't have any clue how to integrate, so I could not tell you it is possible or not. So I think you will need to find out it yourself.