I want to put a user in a new security role after coming back from paypal or creditcard payment and pay and buy a product (in my shop the user buys a softwarelicence). So before he is a "registrated" and after he is a "registrated" and "registrated with payed orders" user.

So I can make a difference between this usergroups with the security role.
Is this possible and how!?

Thanx's  

Great It works!

I declare the product as a subcription product in Cat_Products in detail mainpage.
Set the subcription period to 36500 days ( 100 years are a long time and enough).
Set the security role ti the role I wish.

And after the status of the order ist paid, the user is in the role I set.

That's it. the workaround is O.K.

Thank you ...