what part of "4th edition" did you not read?
rakshaka or however they're spelled are no longer supported as character races (not even in the monster manual!).
if you're wanting to join, but don't want to be a human, elf, half-elf, eladrin, tiefling, dragonborn or a halfling, the back of the monster manual has a list of other creatures you can pick. they support orcs, gnomes, minotaurs, and even gnolls!