"The program" and pandoras box :|

I just found some very good ressources on how to do copy protection. But it's opening pandoras box :|
I might actually go for a shake n baked solution as it requires setting up an IIS web server + licensing server and the  principles behind copy protection seems like a whole project by itself. So if I want the program to be finished in the near future I ll go for this solution. But it settles my mind quite a lot as this area was pretty unsolved untill now. The solution also includes paypal integration and that's sweet music to my ears :)