BWA HA HA HA HA HA! OMG! I must be the biggest console gamer on AT and even I laugh at the prospect of using anything but a mouse and keyboard for an FPS (Except Metroid Prime

)! Sorry for the thread crap, but you should really try configuring it the "natural" way. Use your mouse for looking/turning. Use directional keys for foward, backwards, and sidesteps. Mapping the directional movements to W, A, S, D allows you to space your hands apart naturally and reach peripheral keys for additional functions. I go one step further by always setting jump to the mouse (Primary actions like shoot and jump should never affect your directional movements for a console gamer

) this means I need more than a wheel mouse for Unreal, UT and UT2K3 but it's always worked out great (All my hard-core PC gamer buddies play with my method

).
Just learn it! Otherwise you WILL BE HANDICAPPED. You simply can not possibly do with a game controller what you can do with a keyboard and mouse. For one, a controller either has an analog axis (Joy/thumb stick) that "returns" and has a maximum turn speed (ie, speed limit) or a digital pad that has a maximum turn speed with no speed control. With a non-optical mouse, you can turn as fast as you can physically move it or as slow as you want and it will always stay where you leave it. You simply can't with a pad or joystick under any circumstances. Setting "Autorun" and simply tapping a key gives you as must directional speed control as you'd ever need (Who the hell would want calibration to limit their maximum speed?!).
I played some crappy Unreal Tournament "virtual reality" game at a local mall which used a joystick. Left was screwed up so I had to turn right or strafe (sidestep) to do everything. Because of the maximum turn speed at the joystick's extreme limit, it took 5 second to turn around when you could turn around INSTANTLY with a mouse! They used the joystick to RIP PEOPLE OFF.