Chimp and whore, those are the default controls for the game, so yes.
I didn't change to the arrow keys cause I can see how hard it would be to play with those unless I used my left hand to control the mouse. Me so smart, me think ahead.
And I ALWAYS strafe. It's tricky getting used to aiming with the mouse though. Usually, in most console FPS that I'm good at, the strafe buttons are next to the aim up/down buttons, like the c-buttons on N64 or the c-stick on Gamecube.
I just checked the name of the game and it's Allied Assault. I don't think you need the expansion pack though. I'm not sure how it expands the original as I've never played without it. Probably something gay, though.