Thanks for you patience.
There is no way to turn safe mode option on or off. If this never appears it means files of windows have become more corrupt. However, if the windows disk you have is not scratched, I belive the hanging would have been do to the errors on the disk that we got repaired.
Do you mean that the hard drive has more than one partition. If it does, we could format that one, do a fresh install of XP on that, then when it boots, the original partition would show up as another drive under My Computer.
Clearly, this desktop software has severly been corrupting the windows registry. And if all else fails, the last option we have is to get this:
Hopefully we can get it. However, there are two commands I'd like you to type while in the Recovery console. When the xp disk first loads, press R to enter the recovery console.
Type these commands and press enter. They will each ask for a confirmation.
Perhaps these will give us access back to safe mode.
Again, thank you for all your patience. Anyone else would have said "forget it" by now!