ActionScript 3.0 :: Create A Sort Of SMOOTH Transition Between Swfs?

ok so im trying to create a sort of SMOOTH transition between swfs.

the problem im having is, targeting a specific label when i need it.

what i mean is, i can target it fine by tpecasting my external as a MC, but...it doesnt give me the desired effect.

for example, i want it so that when a button is pressed, go and play the "outro" frame inside the external swf, at the end of that same external swf, theres an " end" label, when that label is reached. something happens etc.

my problem is that when i hit the button, at the time of that event firing, the "end" is null or rather undefined because it hasnt reached there yet and i get an error or if i do a if/else statement, then i get the else part firing off since again, "end" isnt reached yet when the button is pressed.

i dont know how to make it fire when the "end" label is reached.

i tried while loops but...no good lol. thing froze flash for a bit until it did fire, by then it was a mess lol.

heres my code:

Code:
stop();
var loader:Loader = new Loader();
var urlReq:URLRequest = new URLRequest("indexCoontentLoad.swf");

[Code].....

ive added a " here i get lost" comment to indicate the part im lost in/cant figure out how to write.

overall, what i hope to achieve is that when the "end" label is reached, something happens. else, just keep playing until it is reached.