I'm going to make it short and simple. I'm unsure if this is equivalent to the XP in a Private Match glitch but whatever. I only tested this on the PS3. Pretty sure its PATCHED. Oh well.
Pretty sure its PATCHED.
1. Have a friend host a Combat Training lobby, but make sure he doesn't start it.
2. Highlight "Playercard" on the left of the screen, and click triangle and find his name and join his session.
3. While Joining (Not after you joined, before you actually join) click on playercard. It'll show your stats changing from your real account to your combat training one.
4. When in the lobby, back out to the multiplayer menu. (You, not your friend.)
5. Click on player match.
6. Your name should appear, however you should have no rank (It should be blank.)
9. Find any match you want to boost in and have your friend back out when its trying to find a match of that game type. If not, he will be put into a random game. Not a big deal but still. (The lobby should not let you click on lobby leaderboards when you first get into it, thats how you know it works. As you can see by the picture, the leaderboard lobby, located under playercard, cannot be clicked on!)
NOTE: If you record vids or if you need help add ngu_g-shooter
Certain game types DO NOT WORK! Demolition is one of them. Random people begin to join. Another thing, make sure you invite people right away. Sometimes the game switches hosts and random people WILL join then.
Oh yeah, don't blame me if you get banned for boosting LOL That would make you look so stupid.