create a blank first frame. place this code in the frame.

var thisVersion = getVersion();
var stringVer = String(thisVersion);
var playerVer = stringVer.charAt(4);
if (playerVer != 6) {
getURL("http://www.yourhtmlsite.com");
}


this will test for player version. if it is not the version you need (6,5,4...) you can direct the viewer to a non flash page or a place to get the flashplayer. if the test is true this will just go on to you flash site.