Hi!

I had the same unknown method problem. The problem lies in the fact that your unpacker is outdated. You should donwload winace 2.02 (www.winace.com), that solves your problem.
Please tell if the crack works fine with you. When I apply the crack (on the updated game) I can play everything (tutorial, multiplayer etc) except the campaign mode. (The game then asks to enter the cd and does not recognise my copy). Do you have a solution?