So, let's take a look at using tell target to affect different timelines:
Affecting the Main Movie Timeline:
Begin Tell Target (_level0)
Affecting a Movie Clip (MC):
Begin Tell Target ("/MCINSTANCEName")
Affecting a MC inside another MC:
Begin Tell Target ("/MCINSTANCEName/MCINSTANCEName")
Affecting a MC inside a MC inside another MC:
Begin Tell Target ("/MCINSTANCEName/MCINSTANCEName/MCINSTANCEName")
You get the idea...The thing that makes this work is giving each occurance
of a Movie Clip its own unique "Instance Name" (You set the "Instance Name"
on the properties dialog of the MC).