I was going to play Skunny Kart with a friend. Unfortunately, the other player uses Tab for firing and Alt for turning right. Guess what happens if you hit those keys simultaneously.

The game doesn't seem to have an option to re-define the controls.

Is there a simple way to disable alt-tabbing in Windows?
Also, I use this shortcut quite often so it would be nice if only dosbox was affected.
I did some googling and there seems to be some third party programs that could do the trick. Any recommendations?
BTW, I'm currently running Windows 7.