Windows 2000 is pretty stable and runs on low end hardware. Used to run it on a laptop with just 128mb of ram and a 300mhz cpu. Many drivers for 2000/xp will work on each other also, seeing as XP is built upon Windows 2000.
You should try disabling unneeded services, turn off wallpaper, limit programs that startup, and disable animations and effects, should help improve performance.
You should try disabling unneeded services, turn off wallpaper, limit programs that startup, and disable animations and effects, should help improve performance.