How can I get password to get into Win2000 on my old work PC?

I dont know admin password for Win2000 laptop and now my personnel password
doesnt work any longer either.

I DO NOT have any Win2000 CDs to create a boot disk.

I did my best Google to find a solution and found a admin password solution
with this:
http://www.lostpassword.com/windows-xp-2000-nt.htm

Unfortunately it requires a boot disk which I need the Win2000 install disk
for...again I have no disks.

If I can get it runninf, laptop will be fine for me to use a Backup server
to drive external HD on my home LAN. I dont want to spend $200 for XP OS
for this when Dell Latitude PII is pretty worthless, and I can buy a brand
new PC P4 from Dell for about 150 more. Also I dont want to go the steep
learning curve to put Linux on it.

Any help appreciated.
Thank you