I think the only way to play WMV-HD files is with QuickTime and Flip4Mac. Like you said, VLC doesn't play the audio. I have a 2.4ghz SR MBP with 2gb RAM and everything I tried to play in QT worked fine other than taking a few seconds to start up the video. But if anyone else knows other players for WMV-HD files I'd love to know as well.