I know what you’re saying, but I don’t think the quesitoner does…
about blocking by levels.
Only the Flash player has an opaque background… any movie loaded into level1 level2 etc will have a transparent background.
Anything loaded into a higher level will block the view of the lower level where there are elements in the movie.
possitioning is easy enough to figure out. all movies loaded into levels, possition themselves by their upper left corner. So if you have a 600/600 embeded object with an swf in it’s level0, and you load a 600/400 swf into the level1, there will be a 200 pixel wide strip on the right hand side of the movie where level0 will show through.