Hey, i don't know if this has been posted up on the site before as i am new, but i have recently found out how to get into a private lobby with friends and set up the game to how you want to play it eg. the map, the game mode etc.
Basically its a private lobby but the xp you gain in inside the lobby will count towards you online rank, i tend to use it to work towards my perk chalange by getting a partner and chucking on the tactical insertion.
once again im not sure if this has been posted before but if you want to know more give us a shout.
currently trying to get the 15th prestige lobby back at the moment but it doesnt look like it will happen

yeh ive played it before like once or twice but im sure now it is patched cuz i tried doing it again and it didnt work.

Ye it was patched but we got around it last night, you just cant go over 9000 points on demolition and you have to have the correct game set up and custom file on your file share.

btw GPD's are 100% patched (with some acceptions) because of the TU3 update
so i doubt your coming across another working 15th lobby GPD.