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Looking for some help in converting a Logitech Dual Action game pad to a PC driving wheel.

I know my basics around wiring and soldering, but I need some help in finding the area on the Logitech Dual Action game pad circuit board I should solder the potentiometers for the Wheel and the three pedals.  Also, what Ohm Potentiometer should I use for this controller?  I have a few 100K pots left over from a guitar project, but I'm not sure if it'll be too much for the controller.  

Attached are a couple of pictures of the circuit board (not mine).

Thanks!

Picture of Looking for some help in converting a Logitech Dual Action game pad to a PC driving wheel.
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