In reply to Bruce Hooker:
They look useful, I'll check them out when next I have a problem...
I do have a PC, and I was previously using moviemaker (the standard comes-with-new-pcs package) to make little movies. I have to say it's a lot less picky about file formats than iMovie, and possibly more intuitive to use. It does crash more though.
Anyway, the pc with moviemaker on has become unavailable, so I was forced to use the mac.I found that this:
http://www.alfanet.it/squared5/mpegstreamclip.html
Was brilliant for converting movies to whatver you need (inc. iMovie DV files).
And this
http://www.webmasterfree.com/software/MediaTools/MiscMP3Tools/mp3-to-aiff.h...
(also works for pcs) converted MP3s to iMovie compatible AIFF files. Though why you'd want to do that on a pc I'm not sure. I'm sure there must be a reason, but I haven't needed it yet - I've always just used wavs to make movies on the pc. Perhaps I'm being ignorant, who knows?
Anyway, this page contains everything I've done:
http://members.lycos.co.uk/southlancsbouldering/movies.htm
One of these days maybe I'll get my hands on a proper digital camcorder, rather than just the video function on my camera... though I've got a feeling I'll need a better computer first... ah well. It is an addictive pastime, this movie fiddling. amazing how many hours it can take just to edit a minute or two of footage...