Help with editing coaches....

[Señor Cedric]

Hi guys, I have a bit of experience with editing draft classes, and players now, and would like to put Doc Rivers on the Clippers.

I'm aware that he is png5003.iff.... would I use REDitor? Is there a free way to use it? $36 seems like a lot if you're not planning on using it a ot - more expensive than the game itself, LOL