Restate my problem - YET AGAIN

Question

I have simply created a loader that loads up a swf. Then that
loaded swf needs a way of removing the content that is first
visible in the new swf. The new swf creates a loader, but it simply
loads over the top of that first lot of content rather than
removing it.
Even though Im specifying an index eg: loadChildAt(1,loader)
it doesnt replace the content sitting there from the previous
loader, just places it over the top etc.
HELP!!

Answer 1

I think there is a misunderstanding of how objects a stacked
in display list.
When you place an object into a certain index (z-position) -
the object that resided in this position is not removed/replaced
but is moved one level up - and all the objects above the new
object are moved one position up. For instance, if you have three
objects (top to bottom):
objC in position 2
objB in 1
objA in 0
and you addChild(objD, 1); - your stack order become:
objC in position 3
objB in 2
objD in 1
objA in 0
An analogy could be slipping a card into a card deck.
There are no gaps in display list stacking order in AS3.
As for the stage nullification - frankly it looks a bit
strange for stage should always present. Try:
while (stage.numChildren > 0) {
stage.removeChildAt(0);