Is there a way to turn off key limitations on a keyboard so that you can hold 3 keys at once?

The reason I"m asking is that it's my laptop's keyboard that's the problem, and I don't want to have to hook up another keyboard.

Uhh...nope. The only thing you can do is try to remap the keys so all the combinations you need to press work.

Why would that work?

I don't know if it would or not, but there's nothing you can do in software to fix a hardware limitation.

Ilya, here (http://forum.team17.co.uk/showthread.php?t=31152)'s a thread which might interest you.