I have a mac pro and am having several annoying problems. I'm new to Macs and I probably messed up my installation so I would like to start from scratch and reinstall Leopard on a brand new drive. Here's my question.. I would like to remove the old drive from bay 1 and replace it wit the new drive. After I install Leopard on the new drive can I put the old drive in the currently empty bay 4? Will I then be able to boot into either drive? The reason being that until I get the new installation configured properly and all my applications reinstalled, I may need access to the old installation. If this scenario will work, how do I select which volume to boot at start up?