A while ago I built my parents a pair of firewire hard drives to mirror their computers with. Of course, the inevitable problem is that it's not a one-step process to run the operation. I need a piece of software that can either detect when they plug in the drive and start backing up files to it, or resides on the backup drive itself and tells Windows to Autorun the software. Moreover, I'd like it to be free and precompiled. Anybody have any recommendations?