I'm not sure why it won't run under Win 7,it ran out of the box for me.
On Vista however it needed a couple of files copying into the game.
Project Zeewolf is a T34 vs Tiger mod.At the moment he has released for free some new missions for the game with bug fixes and improvements.
As a paid member you get much more and he is now working on a Kursk mod.
This game is now starting to become what it should have been in the first place.In fact ZeeWolf is turning it into the best WW2 tank sim.
I suggest you get over here and have a look.You will get plenty of help,they are a great bunch of lads. http://www.subsim.com/radioroom/forumdisplay.php?f=203