Clarifications first:
There is no KeyWiz USB, you have a GP-Wiz, which is a GamePad/Joystick based USB interface.
But no need to fret.
JoytoKeyworks very well, and failing that, RBJoy v7.
Both will let you assign gamepad button presses to keys and will work fine for controlling front ends.
Just email me if you need copies of them, they are free.
RandyT