I mounted the image using Daemon Tools, and powerDVD automatically came up. But it said there's an unsupported format in drive E: How do I play the file?
Edit: I got it to play in Nero Showtime, but very choppy. I still don't know why PowerDVD won't play it.
Edit: I just downloaded an AVC HD player and it works perfectly. Oh man the quality is dazzling! I can't wait to burn this bad boy on a DVD! :D