You basically want synchronous loading. No, you can't do directly this, you have to perform a workaround method to provide a loaded bitmap to elsewhere. This, though, will make you rethink the entirety of your application logic, at least the part where you want your images loaded.
In order to load several files with a for loop, you need to do the following: First, you make an array of your Loaders, each with an attached Event.COMPLETE
listener. Second, your application should be notified when one of the loaders will complete, providing either an index, or a content link, or both.
var loaders:Array=new Array();
...
for (var i:int=0;i<urlArray.length;i++) {
// urlArray is the array with links to bitmaps
var l:Loader=new Loader();
l.addEventListener(Event.COMPLETE,onComplete);
l.load(new URLRequest(urlArray[i]));
loaders.push(l); // store it, if you want
// do other stuff, like preparing to accept an image
} // and that's all, you initiate and wait!
...
function onComplete(event:Event):void {
var i:int=loaders.indexOf(event.target); // get the index
event.target.removeEventListener(Event.COMPLETE,onComplete);
if (i<0) return; // oops!
notifyApplication(event.target.content); // now you transfer a ready bitmap
// add "i" if you need that index of your former "for" loop here
}