Windows can't resolve login password!!

you will need to logon with local administrator priviledges. all windows 2000 machines have an account called administrator which you would of had to of set the password for. If you did not then try administrator and the domain is the computer nameeand leave the password blank. If not there is software that will allow you to crack or reset 2000 to a blank paasword that you can reset at next entry.

log on the the computer using the local admin account. You can also try to use doamin\user name and then the password. You maynot have access to change anything on the box though. use the lcoal admin accoutn and make the changes you need.

While answer 1 will get you back on the computer, it doesn't solve your problem of rejoining the domain which is your problem if I understand you correctly.
Your problem is essentially one of machine accounts. Win2K uses machine accounts in addition to user accounts. When a computer joins the domain, a machine account is created for it. When you joined the computer to the temporary workgroup, you effectively removed the computer from the domain, hence your problem of "not finding the old network."
To solve the problem you will have to go through the steps of rejoining the doamin. NOTE: to do so you will need the credentials (permissions - user ID and password) of a domain administrator (or some other user group that has permissions to join a computer to a domain).
Hope this helps.

Just to let you know what happened. Could not log in to box using any admin, local or otherwise passwords as windows was then trying to authenticate these passwords on the 'old' domain. Found a very useful program for re-writing the admin, or any otherm passwords from the sam file. http://home.eunet.no/~pnordahl/ntpasswd/

This beatiful little program saved my life, although I'm not sure that your boss will be too pleased if they find out you have it.

This question was closed by the author