you can ALSO configure your keyboard encoder to use the games that don't have configurable controls, but that's a pain.
Furthermore, I think the only way to play an FPS on arcade controls (and it would still suck) would be a trackball to aim, an 8-way joystick to move and strafe with a trigger to shoot, some sort of secondary fire button near the trackball, and a bank of function buttons for things like jump, crouch, change gun etc. No one HAS this layout, that I know of, and it sucks, so just use a darn keyboard and mouse for your FPS'age. Unless you locked the only computer you have inside your cab.
Since the question is answered, can I (sort of) hijack the thread to something useful and pertinent? What PC games play WELL on arcade controls? I'm not talking blatantly arcade-style games such as Mutant Storm and Space Tripper.