How do I get into the Ruins of Ahn'Qiraj by myself?
I am trying to go back to complete the Classic Dungeonmaster achievement. I've been able to do most of the classic dungeons solo, but the Ruins of Ahn'Qiraj requires that I be in a raid group.
How can I get around the raid group requirement in order to run this instance solo? I've read that others have done this, but nobody says how to get in.