I have a USB wheel, and use it just like NoOne has mentioned....only good for the 270 degree driving games (outrun, spy hunter, chase hq, ect.) It works pretty well for being a cheap wheel, mine also has 4 buttons that you can use for weapons or turbo or gears 1-4 and 2 shifter paddles on the back of the wheel for hi and lo shifting.
for the others you'll either have to bite the bullet and get a 360 wheel (Pole Pos, Super Sprint, Ivan Stuart, ect.) or use your spinner to steer.