Flip4Mac 1080p

Hello all - I recently downloaded an 8Gb 1080p version of "Me Myself & Irene", that was encoded in WMV format. When I open the file, Flip4Mac naturally opens, and takes about 4 minutes to process the entire vid. When the movie plays, however, it is incredibly choppy...completely unwatchable. I tried the same thing again using VLC player instead of QuickTime, and the same thing happens - very choppy, then after a few seconds I get some pixelation and freezing. VLC's error messaging starts to complain about more than 5 seconds of video lag or something to that effect. I doubt it's a hardware issue because 1080p trailers from Apple's site play smooth as silk for me. I'm using the new revision of the MacBook Pro that was released on Tuesday - 2.4 penryn, 256mb VRAM, 2GB RAM, etc. The pixelation also leads me to believe that it's a software/encoding issue. Any ideas on how I can get this to work? I know that software that supports WMV on OS X is very limited, so is there any tweak or setting I'm overlooking in Flip4Mac, QT, or VLC?

Many Thanks!

I think you're right about it being an encoding issue. I see more and more unique new (or maybe old) codecs that cause problem with video playback. Would be nice if the PC world would stick to providing stuff that's, at least, compatible with the Flip4Mac standards. I don't see any limitations following that requirement, and in fact, it's pretty extensive, considering all the options available within their encoding specs.
But...doesn't look like that's happening...so, for the meantime, I guess we'll have to "deal".
Do you have the option of booting into Windows on your Mac? I know, it's sure not a great thing to consider, but it might allow you to view these weird formats, when you encounter them.