i ve got the same (or a similar problem) with 16x nvidia drivers: indeo codec is installed and all the videos in T1G and T2 play, but they don't play very smooth, i think it's the same problem you had, it's like they are playing fine for 2-3 seconds or so, then "freeze", then play, then freeze however the sound is continuos... this is very strange.
i've got win XP SP2 btw, and ive got also the newest klite codec pack installed..
i m sorry to dig this thread out, but how do i get your new videos to work?
when attempting to play a video, thief2 crashes. what do i have to do?
in media player classic, all your files play quite nice, but only thief can't handle them.