First question: Do you have any files that you want or need to keep or
slavage from the drive?
Your description of the upgrade processes that the computer has been
through over the years leaves me with no other recommendation than to
cleanly install Windows 2000, anything else is doomed to fail and leave
you with a bad and unwarranted view of Windows 2000. Something that
does concern me a bit is whether or not your computer is suitably
capable of running Windows 2000, check here:
http://www.microsoft.com/windows2000/professional/evaluation/sysreqs/default.asp
These are the bare minimum requirements, for a more enjoyable experience
you should have at least double these requirements.
All that you need other than the Windows 2000 cd would be the proper
drivers for your hardware, you should be able to get these from the
manufacturers' web sites for your different hardware.
DO NOT connect the unpatched computer to the internet without a properly
configured firewall! As installed Windows 2000 is EXTREMELY vulnerable
to worms and virus if not properly protected. These are what I would
consider as bare minimum on a new Windows 2000 installation:
http://www.microsoft.com/windows2000/downloads/servicepacks/sp4/default.mspx
http://www.microsoft.com/windows2000/server/evaluation/news/bulletins/rollup.mspx
You should also upgrade Internet Explorer to version 6 SP1:
http://www.microsoft.com/windows/ie/ie6/downloads/critical/ie6sp1/default.mspx
You can download and burn these large files to cd before you begin, it
makes installing and setting up Windows 2000 faster and easier.
John