I have a question in regards to the races in a Greyhawk game. Obviously there are the standards, what I am really interested in are the subraces. I have looked at the Living Greyhawk Gazeteer and it mentions numerous subraces for elves, and halflings etc. I plan on using the subraces from the FRCS to add this dimension to the game. Will this be unbalancing? Will this have a non-Greyhawk feel? (I have played a ton of Realms so am not too worried, I just don't want to go against the "feel" of Greyhawk too much).