Flash skins / loadMovie blah blah

Does anyone have any good ideas about how to go about making something like Skins for a Flash interface? I have some complex flash movies and I want to separate the graphics into separate SWFs so that people could edit those to change the look of the interface without having to open up the big ugly movie full of actionscript.

I know how to do this with loadMovie() but it would require like 10 different swfs or more (one for each major movie clip).
That's not really an option.

What I'm trying to do is combine the skin into a single SWF.
My idea was to use loadMovie() to load up a SWF that had a blank timeline but all the symbols in the library.

The problem is I can't figure out how to access the library of a loaded movie. If I load the movie into level 1, this doesn't seem to work:

_level1.attachMovie("some_symbol", "blah");

And I have the linkage set up properly in the loaded movie's library....

There has got to be a way to do this.. Am I even on the right track? Any ideas guys?

Note - what I was trying to do with attachMovie was somehow take the loaded movie's library and grab a symbol out of it and stick an instance of that symbol on the MAIN timeline (_level0)
Is it possible or is there a better way of doing this?

Hi ! I tend to load everything into empty MC's on the main timeline. Have u tried that ?