I just recently had an issue installing a BIOS password on my laptop after Dell Replaced the motherboard. It seems that they never replaced the Service Tag number, so if anyone out there ever has this issue there is an easy fix.
To change your Asset Tag, Service Tag, or Owner Name.
Step 1: Build a Win98 Boot Disk (Cd or Floppy)
Step 2: Add the Asset.com file (can be found on dell.com or Internet)
Step 3: Boot off the media
Step 4: Run The Command
a:\ asset (asset id)
a:\ asset /s (service tag)
a:\ asset /o (owner name or number)
Step 5: Restart the system.
I know this seems very simple and may not be a process that will be used often. I just wanted to make it available for anyone if they needed it.