couple questions

Great program

Bought this today and spent the last few hours playing around and figuring it out. (not the greatest at this stuff).

I have the key mapping figured out, can cast from my main to the healer, but, i cant seem to figure out how to auto target the tank to heal him.

Future question, as i want to run a shaman as well, how do i auto assist, then cast slow ect...

Im sure its something i missed.

[Ualaa]

You should auto assist, by just dragging abilities onto the default DPS keys.
IE, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, -, and =.

If you have Slow on "1", Lightning Bolt on "1" and whatever else on "1".
When the Keymaps are on, if you press "1", then all the other toons assist the active toon (no macros needed).
With each toon doing whatever is on "1" at the target of the active toon.

I'd take a look at Repeater Region healing, as far as heals go.
Go with either Grid + GridCustomLayouts + Clique or Vuhdo (stand alone) or Healbot (stand alone).
Sort alphabetically, so the top frame is the same toon on every screen.
And then create a repeater region over the frame, with the priest as the target.
Set what click does which heal.
And from any window, send a heal instruction to the priest, by clicking on the frame of the toon who needs the heal.
There are two videos (Zanthor's, in the video section, Tovya's in the written guide section, plus my written guide on Repeater Region Healing)