(adsbygoogle = window.adsbygoogle || []).push({}); Join a public match lobby, and have a friend invite you into a party.
When the countdown hits '0' press to join their party.
The screen should go like a normal public match, but you'll be on your own, and at the top it'll say Match beginning in 0, and your rank will be missing.
Also at the bottom will be the map in which you would be on if you carried on into the game.
So then hit 'O' to back out, then quickly find match and click on Boot Camp.
Remember you must be host or you'll get kicked out.
Found by me i think.

wow wat a shit way my way = faster n easier go in private click O highlight yes thn press x and O exact time thn u b to multipayer menu click play online your lvl wont show n u can click bootcamp if it dont try gen