I'm not sure what you're looking for, L.
You can use corner points to shape your video for a number of effects, including scale and position.
Is that what you're looking for? There are no "box" effects.
Well here is what I want to do. I imported a cube I made PE8 and I want to contour three movies to the shape of each square on the cube.
I believe that you want the Effect>Corner Pin. I do not know where it is in PrE 8, but you can use the Q-box and just type in "corner." It will come up.
[Edit] Forgot to add that it's under Distort in PrE 4.
In pre8 its still under the Distort category i.e. Effects > Distort > Corner Pin.
Thank you for that confirmation. I have found that PrE 8 has moved, renamed and deleted some things that I took for granted, so now I qualify almost every statment regarding that version.
Appreciated, and hope that is what the OP is seeking,