Specter, I had the same problem with the joystick. But I just delt with the sideways movement. After a few times it becomes second nature.
Before I realized about the capture function I tried the wave analysis with me singing, and then loaded the original back in. It was close but I could tell the difference. This is what made me so happy that the capture was available.

But if your feeling realy ambitous, you could probably take the joystick apart and rewire it... however it wouldnt do you much good if you tried to use it for games.