Download LiveMCer from this forum link:
http://www.mmowned.com/forums/bots-p...n-climber.html
Open it, then open WoW, then alt-tab back to it and press the Enable checkbox.
Now, go to the Orgrimmar auction house. With MC'er enabled, run straight at this wooden support beam shown in the below pic:
http://home.cogeco.ca/~jesse-h/MCAuc1.jpg
If you did it correctly, you should go up in the air and fall a bit to the back of the auction house (*keep holding forward or else you will fall before you get to the back*)
http://home.cogeco.ca/~jesse-h/MCAuc2.jpg
I've tried it twice with success, I hope it works for you guys.