Is it the gamepad control panel that’s doing the 0/100 on the triggers or is it the game?
If its the game give this a try, if the game thinks its an Xbox controller the analogue throttle / brake should work fine.
Not tried using my generic controller yet, I use my PS3 controller using this handy tool: Clicky
You can set it to emulate an X360 controller in the options, not had any problems with it yet. If you’ve got a bluetooth dongle it works wirelessly as well.
See comment 51 on Murrays review for details on how to lodge a complaint. He needs to go.