Flash MX has an new capability that developers have been begging Macromedia for since they bought Flash; it can import an external JPEG file.
The way you do this is simple. Just use the a loadMovie command like you are planning to replace a movie clip with an external Flash movie. However, give the location of a JPEG file instead:
myMovieClip.loadMovie(”picture.jpg”);
The movie clip is now replaced by a movie clip that holds that bitmap image. Check out the movie 23loadjpeg.fla for an example.
Loading a Sound
There are also two ways to play a sound from an external file. They both use the sound object and the loadSound command. The sound file needs to be in the popular MP3 format.
Taken From: Sams Teach Yourself Flash™ MX ActionScript in 24 Hours
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