Reactivated with the scrolls last week. Trying something new with a few more healers.

I have a Holy Paladin and Disc Priest currently (with my 4dks). Trying to get the healing setup and using VideoFX. I have watched the basic video. I want to bring a 3rd healer online, but trying to setup this up first.
I want to overlap my grid setup from my Paladin and my Priest. So when I mouseover a character in Grid, I use a mouseup (set focus), it does it for both.
I have both their Grid's exactly the same.
How do I achieve this?

If I put the video feed from my priest on my paladin's grid, my mouse does not mouseover my paladin's Grid, just what's on top (the Priest feed).

I tried to screenshot this, but the video feed does not show up in the ss.

thanks,
acid