After opening Mac HD folder, made the mistake of attempting to change name next to house icon (Home? perhaps) along left spine (spine that includes 'Desktop' 'Documents' 'Applications' etc.). The computer started to run as if adjusting to the name change. From that point on, iphoto/tunes/aperture starting opening as if it was the first time asking for set-up preferences. No photos/music can be found in the folders. I can still see my folders on the external hard drive that the tunes/photo are on, but they will not open when I open the programs. Any suggestions on fixing the links? I tried in vain to change the name back. The error message says that the previous name is already taken. Thanks in advance for any advice.