Can you attachmovie clips , multiple ones, to one main mc?

i want a to make a collage. each image will be attached, and it will be moved into their respective xy locations. what I want is that these images be attached within a main Mc on the maintimeline. So I can manipulate the position of the entire collage, moving as one entity.

is this possible from the main timeline. or do i just write the code within a Main mc.