This is kind of funny but I will probably install this when I get home.

http://www.wowinterface.com/download...Omfg.html#info

Omfg
Wonder how many times it took to get into that instance? Now you don't have to! Omfg removes the "additional instances could not be launched" and replaces it with a running tally of how many times you've tried to get in.

Got in? Awesome! The count will reset for the next time. Have fun!