I am trying to install both imovie 06 and imovie 09, so I can use either app. When I installed imovie 06, the viewer in imovie 09 stopped working...I could see the video clips in the event library of imovie 09, they even moved when scrubbed, but the viewer was black. Not to mention, MPEGStreamClip, JES, and QT also stopped working correctly. I had audio, but no video. So I tried uninstalling both imovie 09 and 06, installing 06 first, then reinstalling 09. After reinstalling 09, 06 wouldn't open when I clicked it. Even following the advice of the Apple representative - uninstall the entire iLife 09 suite, install the entire iLife 06 suite, and reinstall the iLife 09 suite, didn't work. If 06 is installed first, it won't open after installing 09. If 09 is installed first, the viewer (and the aforementioned softwares) don't play video, audio only. Any suggestions?