Hello,
I have not installed Bit rate throttling - will it help?
2 yes - you can play the url directly by opening it through windows media player. The issue is we want to be able to send links directly to the file. We have a somewhat similar issue with IIS7 and links to https WMV files - if you send a https link to them, they get play fine but you get prompted once for the file in IE and then a second time once WMP opens.