I have had a G25 for quite a while now and have played most recent driving games. R factor, GTR Evo, Grid, Dirt, Dirt 2 etc etc. In my opinion, Shift is the worst game out of all of them. I spent hours trying to fine tune the wheel settings but couldnt get anywhere.
The sensitivity of the accelerator and brake is crazy. You only have to look at the accelerator and your wheelspinning all over the place. It is horrible and I eventually gave up trying.
Dirt 2 on the other hand is absolutely amazing with the g25.
If anyone here has managed to get thier g25 working as it should in shift then I'd be very interested to learn what settings they used.