first frame Action Script:
bloaded = getBytesLoaded();
total = getBytesTotal();
second frame Action Script:
bloaded = getBytesLoaded();
percent = int((bloaded/total)*100);
third frame Action Script:
if (bloaded < total) {
gotoAndPlay(2)
}
>> This is your basic preloader. Make a text box on the second frame with var percent and it will output the percent of loaded. You can also use the percent value to make a loadbar, or be lazy and just put "loading..." in the second and thrid frame.