Loading a portion of video

i am loading an external .swf that has a quicktime movie emedded in it. is it possible to only preload a small portion (say a quarter) of the file and then load the rest while it is playing? thanks!

this is the code i am using right now for the preload:

bytes_loaded = Math.round(this.getBytesLoaded());
bytes_total = Math.round(this.getBytesTotal());
getPercent = bytes_loaded/bytes_total;
this.loadBar._width = getPercent100;
this.loadText = Math.round(getPercent
100)+"%";
if (bytes_loaded == bytes_total) {
this.gotoAndPlay(3);
}