I just to FC3 on a thinkpad R40 (centrino, radeon 7500). Everything worked out of the box, including 3D, except the wireless drivers had to be installed manually. However, there was no trickery involved, just compile and install them and the FC3 hardware sniffer picked in up for configuration on the next reboot (and you could configure it manually without reboot).
I was actually surprised how smoot it went. Now, my full, payed for, version of Win2K refuses to accept the CD key that worked on my previous computer on the thinkpad. What's up with that?