SingleWhiteMale, you said you would be happy to help if I had any other questions regarding the resetting of the password on my late brother's laptop.
I cannot reset it using the system disk as there is a problem with the cd drive, which will have to be replaced - the disk is fine. I've firewired it up to one of the G4s and copied all data over.
Can I wipe the laptop and reinstall the system from the G4? I can't afford to replace the drive atm, as we still have two funerals to pay for, probate has not been achieved yet, bills are piling up etc etc.