[MacDV] iMovie won't open or reinstall

[Neil Poese]

I'm teaching in a high school video lab on eMacs running 10.2.8 and 
10.3.8 and iMovie 4. After the students finished importing QT.DV files 
from external hard drives and editing their show, they closed iMovie and 
then it wouldn't reopen. I transfered the file to a second machine, 
iMovie opened OK, but then it wouldn't reopen after being closed. After 
exporting the file to QT.DV I was able import the file into a third 
machine (and transmit the show to a waiting audience of 2000 kids).

To fix the two machines that won't open iMovie any more, I tried 
dragging the iMovie icon out of the App folder and then doing a custom 
reinstall, but the check-mark for iMovie wasn't even available on the 
custom install window. I then reinstalled the OS and did a clean install 
of the iLife suite, but I still can't get the machine to open iMovie.

Are there iMovie files that are hiding from me that, if deleted, would 
permit me to reinstall it? I'm looking at the prospect of wiping the 
drive clean and reinstalling everything - and I really would like to 
avoid that!

BTW, I guess that I had some corrupt file in the iMovie project file - 
but I've been using iMovie since version 1, and this is first time that 
something like this has happened to me.

Thanks!
Neil Poese