I thought most 4 shaman + tank combos use all 4 shaman as dps?? that's what I would do anyway. Four great DPS plus four not bad healers.

There is a thread on paladin tanking macros already, you will have to search for it. It's no different than if you were soloing it.

There should also be one for elemental shaman.

I am not sure about healing, but it shouldn't be difficult to figure out.

Watch all of Hachoo's videos. He is running a DK + 4 shaman, that should help somewhat as Enndoh suggested.