Resizing a MovieClip's contents

Question

I'm loading an external swf into a movieclip (the external
sfw plays a
slideshow of JPEGs). When the slideshow plays, the JPEGs
extend way beyond the
bounds of the movieclip. How would one go about constraining
the JPEGs to
their original size and centering them on the stage? And
where would one
place the actionscript using AS2, on the movieclip itself?

Answer 1

OK - for anyone that may need it - I played a bit and got it to work:
var mediaDirList:File = File.documentsDirectory;
mediaDirList = mediaDirList.resolvePath("tester/");
mediaDirList.getDirectoryListingAsync();
mediaDirList.addEventListener(FileListEvent.DIRECTORY_LISTING, directoryListingHandler);
function directoryListingHandler(event:FileListEvent):void {
    var list:Array = event.files;
    for (var i:uint = 0; i < list.length; i++) {
        trace(list[i].nativePath);
This seems WAYYY simpler than some of the solutions I looked at, so I'm wondering if it's best practice - it would work cross platform, right?
Thanks (forgot my manners in the last post).
Shaun