This effect is a snap in Premiere. Specifically, considering the Brady Bunch thing: Say you have 9 AVI clips.
The main image appears on Track 1.
Then the remaining 8 clips appear on successively higher superimposition tracks. You'll have to tell Premiere to add enough superimposition tracks -- to do so, look under (I think) track options by clicking the triangle along the right side of the timeline.
So, now you have a 9-track, 30-seconds of video or so.
For
each of the superimposition tracks, apply Clip >> Video >> Motion and squish the frame to wherever you want it. You'll figure it out once you start messing with the settings -- Motion isn't that tricky.
It's a neat effect -- I do stuff like this all the time. Me and superimposition tracks are buddies!
Cheers,
![[monkey] [monkey] [monkey]](/data/assets/smilies/monkey.gif)
Edward
"Cut a hole in the door. Hang a flap. Criminy, why didn't I think of this earlier?!" -- inventor of the cat door