How do I find the neccessary codec?

What sort of computer are you using? If you were on a version of windows then Window Media Player is pretty smart about finding and installing new codecs - and quicktime isn't obscure.

My approach would be to use google to for your movie viewer and mov and codec

Wow my bad! Very poor description of the problem on my part. I'm running Windows XP and I'm trying to open and edit the video using Adobe Premiere, but trying to open it with Windows Media Player so it can find the driver is a good idea. I'll try that.

Wow, synchronicity, I'm just now editing with premier (CS4) and there is a mov import option but it's probably because I've installed so many codecs via wmp.

I'm using Premier CS3, didn't have the money to upgrade yet. I've been with Adobe all the way back to After Effects 3. Not CS3. I upgraded from 3, 4, to something, to Pro, to CS3... This time I just haven't had the money.

Anyway, I can open and render MOV files, but these particular ones I can't seem to get open. And I've been trying tons of codec packs with no luck. Any ideas anyone.

I'm very new to Premier - all my codec knowledge is in audio files.

It sounds like the version of Final Cut Pro wasn't saving them in 'full compatibility' mode - if such a thing exists.

Does this sound like your issue:
http://forums.creativecow.net/thread/3/893500

Gotta love google.