|First your link does not work.|
What are you intending on using it for?
You have a system that is 10years old and I suspect that after you try upgrading the stress on the system will generate problems that are more trouble than resurrecting an old system is worth for your time.
I do not know where you are but trying to upgrade a system that old will cost you more for parts than a new system will. Running XP on a system with only 512mb will be extremely slow.
The review I read from 2000 stated the graphics were poor for any gaming or decent video work. The specs do not indicate any upgrade level for the CPU, I suspect it would be in the range of a P4, 1-1.2G. I can't find the CPU socket listed on the specs, do you know what is on the board?
The specsindicate that one of the first things would be trying to find a power supply that would handle the changes. The one you have is 145W and a minimum to boost CPU, HDD, CD would be 250-300W.
PSU = $30
HDD (80GB) = $40
DVD = $30
CPU = $ (dependent on the socket needed)