i have 2 teams with priests, and i had the same problem u did, i didn't need him really healing while doing dailies and what not so i use the Numpad for the priests spells and 1 through = and shift 1 through = for my dps/tanking buttons/macro's.

my priests binds look something like this

Numpad
0 = Targetself cast flash heal
. = Holy Nova
1 = Target party leader cast flash heal
2 = target party2 flash heal
3 = target party3 flash heal
4 = target party4 flash heal
5 = flash heal (whoever is targeted)
6 = renew (whoever is targeted)
7 = greater heal (whoever is targeted)
8 = PW:Shield (again whoever is targeted)
9 = circle of healing

it took me about an hour to relearn all my healing spells as for 4 years almost i've been a regular dual boxer, using 2 keyboards tanking on main pc healing on other with right hand reaching over to use f1-f5 to target party members and then the 1-6 and shift 1-6 to heal, pretty much macro free. going to 4-5 boxing from 2 boxing i found i really needed to use a LOT more macro's than i ever did before. i still haven't got into the Focus macro's but i do understand how powerful and useful they can be, i'm just an old dog and can't learn new tricks that easily so i've stayed away from focus.