Here's the basics,
Okay the first thing to do is to open up yahoo pager, and sign on of coarse you'll ened to think of an intresting username that ahs to do with your character but still that's the first thing you need to do,
During rpg's all OOC messages, also called Out of character will go in parenthesis.

(like this)

And when switchignf rom character to character change your color ^^
Forexample if I was selphie and squall,

Selphie   Squall   

And I'd use those colors for those characters and whatver id's say with those characters.
And on the message board just use your character name and a :
For example,
Selphie: I'm soooooo cute!!! Just hug me!