Quedaria asi.
Código PHP:
var espacio:Number = 86;
var baseX:Number = 37;
var baseY:Number = 567;
var files:Array = ["file1.swf", "file2.swf", "file3.swf", "file4.swf", "file5.swf"];
for (var a = 0; a<files.length; a++) {
clip_mc = this.attachMovie("mi_clip", "mc"+a, a);
clip_mc.fileLoad = files[a];
clip_mc.onRelease = function() {
trace("Cargando "+this.fileLoad);
//clipContenedor.loadMovie(this.fileLoad);
};
clip_mc._y = baseY;
clip_mc._x = baseX;
baseX += espacio;
}