is there any way to have a swf play at its movie size, without specifying it in the parameters?

like, if 1.fla was 200 x 400 and 2.fla was 500x500, is there any setting so that, when they load up as swfs (in a browser), they appear at their own sizes? (withOUT specifying their measurements in the settings).

as of now, if i leave their sizes unspecified, 1.swf and 2.swf just fill the screen (distorting themselves during the enlarge).

(i ask this because im trying to use flash movies as header graphics for my message boards. some headings will be, say, 300 pixels high, some will only be 200 pixels high, but i dont want to access the settings for all of them. i just want them to appear at the dimensions of their fla)

thanks!