I have WOTLK on my main account. I am gonna start DUALBOXING tonight. And want to know if I have to buy all three WoW games: WoW, TBC, WOTLK tonight in order for me to play with my 2nd toon as well? I am going to play 1-60 first. For DUALBOXING? I know its sounds like a dumb question but I DON'T know the answer to that. Please help. I am going to Best Buy in an hour.