This week's book giveaway is in the Testing forum. We're giving away four copies of The Way of the Web Tester: A Beginner's Guide to Automating Tests and have Jonathan Rasmusson on-line! See this thread for details.
how wonderful would would be if there is something without limit .
open mq explorer right click on your queue, click 2nd property "Extended" on left menu, then 2nd property on right menu is what you are looking for, Max Message length, but be wise is setting it to as much you need+ buffer.
All desirable things in life are either illegal, banned, expensive or married to someone else !!!