i think this is what you want.
for 60 sec intro
use a loader for one pic or series of pics then:
a) right click in the clip start and use the set clip length to how many frames you need(example 15 seconds)
then use a second loader and right click in clip start section and set set clip length to 25 seconds
then in the timeline section just dragged either the first loader or second loader to desired visual effect or animation.
now just got to figure out how to set image to scale and postion and i think we are in business. i am trying to do a tv intro animation.