Help Importing a movie clip into an existing movie

I am still getting the hang of actionscripting and such with Flash. I HAVE to do this for a company presentation (my job) and I’m a bit confused. Do you HAVE to have your existing flash movie on a network to import or load another movie clip into it? Any advise or answers would be greatly, appreciate- I am on a time line. Thank you!

Do you have both FLA files
are you “importing” the movie clip, or are you “loading” the movie clip?