Hobo is right, the devs also said that you should try to set appropriate monitor resolution manually in game.ini

thanks for the responses guys. I've tried all of your suggestions to no avail. I did however try another copy of the game, and I can't mention where I got it but it works perfectly fine on my computer but the Gamersgate copy still does not, I'm starting to think I got duped on a bad Gamersgate copy or something? I didn't get any errors during the download from them or anything, and their support still has not responded to my email.

I had (past tence!) that same problem. Here's the solution:
- go to My Documents/My Games/Kings Bounty
- COPY 'game.ini' file to My Documents/My Games/Kings Bounty Princess
- that should do the trick (game will initialize)

try removing the game.ini file
 

I had the same "no startup issue", but I fixed it by moving the game.ini (just incase I still need it) out of the /data folder. I did also temporary removed my mods, and placed them back in once the game is working again.