Can't logon locally

I have been trying to bypass domain logon on some systems so that I can upgrade the machines

All the machines are set up in a school with strict policy settings to limit student access.

I have admin rights but I'm blowed if I can work out how the previous admin guy has got a script running that changes the registry before the logon screen appears.

The machines are windows 98se logging on to a NT domain. I'm not in a posiiton to re-install the software on these machines but I can reload device drivers if I could logon to Windows locally!

The current logon screen doesn't permit me to escape the logon but forces me to logon to the domain which is useless for offsite repairs.

I found this script embedded in another script - can anyone tell me what this does exactly?

REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\????? Computers Ltd]

[HKEY_LOCAL_MACHINE\SOFTWARE\????? Computers Ltd\Network]
"Server Path"="\\\\%servername%\\users\\"
"ProfilePath"="H:\\"
"FileName"="user.man"

The ????? represents the name of the previous admin people who won't help me incidentally.

Thanks

98se and strict policy??? Hahahahaha! Just unplug the NIC (or disable if on-board), no more domain logon required...

Safe Mode?