I havn't used it with the new cpu yet, but the old one took about 2 hours to install, another 30 minutes to format the drive, and you have to wait about 10 minutes after it starts before it loads some invisible crap and it actually is usable as long as you dont try to multitask(you know, like notepad and calculator, dunt work very well :P).
As a matter of fact, you cannot install XP on a 486, but if you upgrade it with an AMD 5x86, you can with all its 100mhz power :P
I messed around on the lenovo link you sent, and it appears they have quite a bit of support for their ISA modem:
However they don't really have anything outside the modem drivers, no video, chipset, or even the bios update.
Wow lenovo did a crappy job with ibm.
Anyone find the bios on 3rd party websites?