There seem to be a few topics on here about backing up Hal,so here's a system I've just started using.
There's an online backup site called Mozy that gives 2GB of free storage and synchronising software that runs in the background (It can be suspended).All you need to do is select your Hal folder and add the important files, halbrain.db,hal6.uhp and any plugins and it will automatically upload them when your system is idle or on demand.I've also set it to backup the appropriate Haptek folders for backgrounds and skins.For some reason the latest version of the software treats Program Files as a hidden folder so needs the appropriate box ticking in the settings.Whenever it does a backup it still keeps the old version for 30 days so no problem if an upload happens just after something gets changed by mistake.
Downside is they require an email address and wiil send you an email a week but that seems a fair deal to me,for what they offer.
Upside,as everything is stored on the net it doesn't matter what happens to your PC or backup disks,your important bits of Hal are just a download away.
If any one is interested here's the website
http://mozy.com/ My referral code is CPW39C That just gets more space for my account if entered on the sign up page.