Hello, i'm a 2 week mac user and i'm having problems with imovie (version 7.0). it's the only ilife app that won't launch with an error "You cannot use this version of the application iMovie with this version of Mac OS X." My OS X is version 10.5.4 and my system is MBP 2.4ghz. I tried downloading and running the iMovie upgrades but they won't proceed either saying that "an eligible iMovie app is not installed or something". Can anyone help please? Thanks in advance.