Boot with a '98 bootdisk; run Fdisk and inspect partitions; it will display the partition info as it applies to your drive. You can also delete partitions via this util; and recreate them; and (re)format them using Format (both utils are on the '98 boot-dsik).
Fdisk tutorials - as it sounds a little as though you may find them useful?
http://support.microsoft.com/support/kb/articles/Q255/8/67.ASP
and
http://www.compguystechweb.com/index.html
(also has other useful info too...)
Also visit Bob's site at:
http://www.btinternet.com/~robert.bale1/formatinstall.htm
covers Fdisk etc; also installing '98.
Saves going through it all here; and you will have an on-line resource if needed?
Note: if NT has ntfs partitions then they show up as non-DOS partitions via Fdisk.
Fdisk will 'not' remove ntfs from an Extended partition area; it will remove ntfs from the Primary partition.
If you have ntfs in an Extended partition then you either run NT setup and choose to delete all partitions, then close out and reconfigure drive for '98 using a '98 boot-disk; or use the NT3.1 Resource Kit util " delpart.exe ". This is a freebie download util (27K); fits on a floppy; is run from a DOS prompt.
You boot up with a DOS/'9x boot-disk and at the a: prompt change floppy to the delpart one and run the util. (Or copy the util to the 'boot-disk and run from there - at the prompt; saves a disk change.)
Delpart at:
http://hercules.lss.ksu.edu/download/MSSTUFF/index.htm
Delpart will remove just about any partition - permanently!
For future referrence - re passwords... check out:
http://www.computing.net/windowsnt/wwwboard/forum/17360.html
gives you various options.
Also Admin. should have been able to reset/change the password (when the emloyee left)? If an employee forgets their password, then that's a standard routine?
Are you in the UK or where?