I had races and classes in a game I was making a while ago, it died but whatev
I used a variable for the race. They way I had it, the player choose a race from a list then I'd set the race name with a script call, $game_variables[ID] = 'RACE NAME' then edited the status screen to display the variable. I also used the change parameters event to add race specialities and such.
Don't knwo if that's what you going for but I thought I'd say it