Thanks OGB, that was a good read about partitions in a nutshell. Both of those programs look like they would do the job, I'll just have to download and look them over to decide which one to keep.
If I set up my OS (Windows XP Home SP3) and data in seperate partitions, do you just move the whole Documents and Settings over to the data partition, then set some kind of shortcut to point to it? I keep several folders on the desktop too, as well as "My Documents", so do they just need to be changed to shortcuts? I know the desktop is just a folder too, but I'm not really sure how it works.
This machine only has one user profile, so that may simplify things too.
Hoping these kinds of questions don't make you Grump out too badly.