Windows Millenium Is not recommeded as it was never very stable and has no support anymore
Although it also has no more support , Windows 2000 Pro is far more stable and requires the following minimum system specs
133 MHz or higher Pentium-compatible CPU
64 megabytes (MB) of RAM recommended minimum; more memory generally improves responsiveness
2GB hard disk with a minimum of 650MB of free space
Look Here and you will see that you laptop can have up to 144MB memory. 16mb is non removable and the rest is by replaceing the current 64mb stick with a 128mb stick instead.
See here for futher upgrades
This caught my attention
" picked up a 30GB Toshiba disk today, but wasn't sure it would fit. some old BIOSes won't recognise large disks. I was worried that my Tosh would only recognise up to about 8GB, which is apparently the largest disk size you can fit in the model below mine.
It was, however, just plug and play. I swapped out the disks, noting that the new disk is half the thickness of the old one, despite having 15 times as much storage, and powered up. Starting up the RedHat
install showed that my Tosh was now equipped with a 30GB hard drive. Pretty cool really, for a Pentium 133."
Yes hes running linux , not windows but it looks like you can have a 30gb drive in the laptop intead of the 2gb.
Drivers And Updates/Utilities Can Be Found Here
In Depth Specifications Here
Cant helpw ith upgrading the processor though , your usually stuck with what you got in laptops
Hope this helps