i just got a Toshiba Tecra S2 Laptop, with a 1.7 GHz Pentium M, 1GB of Ram, and a GeForce 6600 Go graphics.
(Model Nr. PTS20E-121032GR)
Ought to be perfect for Win98SE.
Unfortunately, i wasn't able to install any kind of NVIDIA driver after successfully installing Win98SE, neither the 77, not the "inofficial" 82.69.
That GeForce is to be an PCIe-Version, unfortunately, that's why, i suppose.