Thanks Adrien! Your help is highly appreaciated...!
We're not sure, whether your solution is the right one for us as this all in all seems to be bit too complicated for the users. To be honest: it is already complicated for me now...
Furthermore we think that this solution doesn't provide a fixed percentual discount (like maximum discount of 30% with AUPs) which we need and which virtuemart actually provides but doesn't take us to the next step (-> to pay the rest 70%).
So we were actually expecting a solution which works with the "real" payment methods and provides a clear two-step-purchase like: chose paypal, credit card or credits.
- If pp or cc: fine, buy, checkout.
- If credits: you get discount of max. 30% by AUPs - now choose the next payment method for the rest.
Do you have a solution for this?