Loading pictures and reusing them

Here the thing : at the beginning of the program, I’d like to load all the external pictures I need and sotre them in movieclips.

Then later, I need to “attach” one of the MCs that I have created to another MC (ie : replace a picture by another).

Quite simple actually but I don’t know how to do it, because the attachmovie only seems to work with library elements whereas I use loadmovie() to load my pictures.

Any idea ?

[sorry for repost]