Haven't seen this posted here before, anyone with both a G25 and Microsoft wheel head this way...

http://forum.racedepartment.com/hardware-software/23583-xbox-360-wheel-g25-pedals.html

I did it at the weekend and it works perfectly, didn't experience any of the problems mentioned in the thread. No clutch support obviously, but still a massive improvement.

Only word of warning is that I misinterpreted the diagram on page 2 and got my connections backwards. I'm still convinced the diagram's wrong, but fortunately it didn't cause any damage and once corrected, all was good.