These two apps might save you some grief one day:

RDILLY is a one click registry backup util. Just click on it and it will create a dated folder with a current snapshot of your registry. You can even run it from the command line as a batch file, timed script, etc. "Unlike NTBackup's system state backup of the registry, the HARDWARE hive is included in the backup folder."

http://www.joejoesoft.com/rd.php
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Windrivers Backup will back up your hardware drivers, .inf files, etc to a folder you specify. Nice to have if you need to do a reinstallation of a corrupted driver.

http://freespace.virgin.net/john.mcneish/wdrvbck1.exe