Varible help? (possibly easy solution)

Hi everyone!
I have recently exhausted all of my resources on variables and was struggling with this issue.

Basically, i have a base movie (level 1) that im "loadMovieNum"ing another movie on top (level 2). All i’m trying to do is to unload the movie and return to the base movie while dropping a checkmark on the base movie (to signify that that movie has been viewed already)

here are the source files:

http://www.neoniconline.com/mockup.fla (base movie)
http://www.neoniconline.com/introduction.fla (loaded movie)
on the last frame of “introduction” there is a **[size=4]>>[/size] ** button that should take you back to the main movie and drop the checkmark.

Your help is definitely appreciated! -Thanks, Jeff