'CUT A HOLE' IN THE PICTURE?

Folks,
Not sure if this can be done... but am combining a PP (slides fullscreen) and video of the presenter with a rather faded image of the pp slides on a screen in the background as he goes through the pp in a classroom setting.
Would very much like to superimpose the nice bright slide on the screen in the bkgrd.
Sizing is easy enough through the motion tab with image & wireframe and with the help of the 'basic 3d' filter.
But it would look very cool if we could cut a hole in the presenter's layer and then pull the screen full screen ... and then push it back again.
Is this possible?
Thank you,
JR

let me get this straight...
you want the back PP image to move forward in front of the presenter and cut a hole out like a windo while he is still talking and then take it back behind him again?

yes

i guess i would cut and swap the clips on the timeline for that period of time where you want the window to appear in the PP
and use a mask for the window, this shouldn't be too hard. maybe you can even leave the clips how they are and use a mask and a re-size for the window.
well... good luck!

~Lou~