Thanks for responding.
I have done the shrinking of my C:system drive from 500GB to 400GB and created a second partition of 100GB. I used a partitioning tool recommended on techsupportalert.com called MiniTool Partition Wizard. I used the bootable CD version so I could do the job outside of the operating system. It worked quite well I believe, and was very fast. I am using the second partition for data, and I back that up to an external harddrive.
I have several Vista and Win7 snapshots right now because I am switching most of my software to Win7. I will probably delete all of the Vista but one when I have everything set up in Win7.
I keep a lot of snapshots because I don't like using archives that well. I have found in Vista that when you restore an archive you loose the Windows update history. I don't know why that happens, since a snapshot
is supposed to be an exact copy. If you have an idea about that, I'd be interested to know. I do like the archive concept.