NOTE: This glitch, as you may know, has already been found as well as posted many times throughout TTG. However, since the TU3 patch has been released, the steps to performing this glitch have been slightly altered. These revisions will be posted BELOW:

1. Have a friend invite you to player match.
2. Go to edit player card. Then hit "B" and hover over "Save and Exit".

3. Have friend switch the Lobby to Private Match. In Private Match have them edit game
options to Time Unlimited and score 30,000.(Once in the game. You'll max out at 75 kills and 10 minutes)

***You MUST still be hovered over save and exit. :!:

4. Now have them seitch to Combat Training. In Combat Training have them edit game
options to 1 friend and 1 enemy. Also, change the map to Nuketown now.(You can also play with 2 controllers-Thanks to DDP for finding this)

***You MUST still be hovered over save and exit. :!:

5. Have friend back out. You will get a message say lobby has been closed. Just hit "A".
(If done correctly at this moment they back out you should briefly see a loading screen in the background)Then click save and exit, as well as exit your player card.

6. Now you should be in player match, but it should show your Combat Training rank. If not start over.

7. Invite your friend back to the lobby.

8. Once they re enter the lobby, wait about ten seconds then switch lobby to Wager Match and quickly back to Player.

9. Wait a few seconds and the lobby will begin, with only the two of you.

10. If the lobby does not begin, back out and have your friend invite you immediately.

***HERE IS THE MAJOR CHANGE IN THE GLITCH***
After completing a boosting match, YOU MUST back out to the main menu of CoD BO and restart multiplayer, as well as the glitching porcess to be able to start a brand new boosting match.

PLEASE NOTE: I do not take credit for the posted glitch, i only seek to help the TTG community by revising previously found glitches....

HOPE THIS HELPED!