It works! It's even more responsive than the MS pedals. :)
For future reference on how to do this.
I got a DB9 Female connector from radioshack. http://www.radioshack.com/product/index.jsp?productId=2103806 (no soldering required, it's a crimp)
A standard phone cable (RJ11).
1. Cut one end of the phone cable off and strip each of the smaller wires inside. (should be 4 different colors; Yellow, Black, Green, and Red)
2. Put a crimp connector on each of the stripped ends.
3. Insert the ends into the DB9 female connector using the below instructions:
G25 Pinout (Back of connector facing you)
1 2 3 4 5
6 7 8 9
1=Yellow
2=Black
3=Green
6=Red
4,5,7,8,9=empty
4. Test it out!
Let me know if these make sense. I'm horrible at explaining myself.


PINOUT FOR WHEEL
(tab is facing up, Edge of connector facing you)
y g r b
y=power
g=brake
red=ground
black=gas
Edit: Sorry for leaving you guys hanging for so long.
I have added some pics..