Okay, here's what I'd like to do. System files, user folder, barebones basics, etc., all on one partition. Applications folder, data folders, etc., all on another partition. The big reason for this is that I want to have two system partitions, one for SL and one for Lion. I have yet to upgrade to Lion because I've got system-critical apps that only run under Rosetta. I've been wanting to try it out, though, for some time. Any thoughts?