Let me just finish this thread for you guys

Due to limitations in UI, it is IMPOSSIBLE to do anything that involves targeting and casting without user input on any computer WHILE IN COMBAT.

Thus, you will HAVE to bind a key on your alts to do this. This is INTENTIONAL, and came with WoW 2.0 LUA changes.
Anyway to do this, that doesn't involve binding a key, that has a macro assigned to it, WILL GET YOU BANNED. No IF's AND'S or BUT's.

Use trinity bars. You can bind random combination of keys to an INFINITE number of buttons. Furthermore, the buttons can be macros with infinite length. Thus you can do this all from wtihin your actionbars.