Hi - I'm not sure I'm in the correct forum, but, here goes. Not quite ready to take the plunge yet, so, doing some testing. Here's what I've done: Created a second partition on my internal drive Created a "Lion Boot USB stick" Installed Lion on the 2nd partition What I want to do, is be able to access files on my original partition from Lion, and vise-versa. Unfortunately, for the "user files", like pictures, music, etc... the OS X security is coming in to play. I don't have "permission" from either side for certain things. It looks like I can "share all", or use sudo from the terminal screen to "hack" permissions, but, that makes me a little nervous... Suggestions? Thanks.