I recently did a windows fresh install on my laptop ibm t42 but I didn't have the Cd's from IBM with all the drivers.
So nothing worked! the Lenovo drivers page is so long and complicate..
Well, first I've installed all the drivers and if you ever need to do that to an Ibm laptop take your time to read the installations notes, because when you click once on the program it is only to uncompress the files, once this is done, you need to do a little research till you find an setup.exe file or autorun.exe
I've finally got Internet working, but the wifi card was not recognised, if you ever get this problem the solution is to go to the Intel download site
to get the Intel® PRO/Wireless and WiFi Link Drivers-Only for Windows XP*
well, there you are! Then all there is to do it is to install the Lenovo drivers from the IBM site.