using usb controller on pc game as xbox controller.

hi everyone
i wanted to use a ritmo usb controller on some pc games as an xbox 360 controller.I did try xbmapper i think its called last year but my analog sticks didnt work properly on it.

someone told me i can edit a registry entry and trick my system into believing its an xbox 360 controller.any ideas how i would do this???

p.s. mods if its posted in the wrong section feel free to move it.