DLoad a WinME bootdisk with CDROM support from bootdisk.com and follow the instructions on making the floppy.
When finished put it in the machine, power down and re-boot.
Have the Win2K CD in as well.
At the A: prompt type D: and hit Enter.
At the D: prompt type setup and hit Enter.
Setup should now start.
This should work with either OS CD as long as they are not copies...