If there's audio in there, save it as an external swf file, but set the sync option to stream. Encode at 32kbs for dialup, or whatever u want for broad, then reference these external files using the loadmovie function (loadMovie("track.mp3", "musicmovieclip")) into a target movieclip in your main movie (usually I just put an empty movieclip offstage with the relevant name). I think u'll find it streams brilliantly (better than real in my opinion) with the correct encoding. ;)