Off-topic for the post, but related to your link at
http://www.dma.org/~lundyd/HD_Videos.shtml
My experience with MOV files shows VLC to be a better player than QuickTime. Uses less CPU power and smoother playback (better decoders). I haven't tried splash yet, but if I read the specs right, it offloads some of the decoding to the GPU (probably using DXVA). I'm not sure if VLC supports this yet. For taking snapshot, get Media Player Classic Home Cinema (you only need the file mplayerc.exe - extract it to desktop and delete the zip). Open MPC HC, go to view, options; playback, output. In the third column (for QuickTime), set it to DirectX 9. Then play the file. Pause, and hit the button two spots to the right of fast-forward for frame-by-frame seeking, then press F5 to take a snapshot. I think in MPC HC, they're saved to the desktop by default (in MPC non-HC it's saved to the My Pictures folder). Or press ctrl-S in VLC (no frame by frame seeking).
If you have time, try Windows 7 release candidate build 7100. Windows Media Player 12 can play MOV, MP4, and 3GP files, and all sorts of MPEG-4 (DivX, Xvid, 3ivx, and more) and H.264 contents. Ironically it too performs better than QuickTime Player.