Just set your bios to boot from your CDROM, plop in your win2k cd, choose install, and it will give you a message saying there is already a win2k install on the drive, hit the R key, and let it do its ...

I see many 2.5" and 3.5" SATA hard drive docks (toasters) that connect with USB2 and 3 so you can drop a drive in and transfer files from the external drive to the internal drive that you booted from.