A quick question

[Pago]

Over my school's Spring Break I'm going to make a "sports bar" that features tag-team type sparring rooms. But before I program the rooms, I'd like to know:

1) How do I assign an index to a specific player?

2) How do I assign an index to a specific group of players?

3) Once I assign the index, how would I be able to change the player/group of players that the index refers to?

I'd appreciate it if you answer any or all of these questions. Thanx!