Use SEN/PSN Enabler, Now I also use multiman I have stealth installed but dont use it. From there I got a homebrew that loads the last title from xmb.
I booted up the ps3
went to SEN Enabler hid CFW files and enabled SEN Access.
Let it reboot and check filesystem(only has to be done if your using homebrew in between COD)
Load COD from multiman(not signed into psn this whole time ofcourse)
After getting the menu turn off ps3
That pretty much set it up so that everytime I turn on the ps3 its ready for COD online. To do much homebrew you need to disable SEN access and unhide the CFW files, then repeat above process to prepare for online afterword. But assuming you play COD alot more then using showtime or playing sega...to safely get online I start off by:
Turning on the ps3 and inserting LittleBig Planet 2 Disc
(Not sure if it helps having that particular disc in or any disc at all just figured id add that)
Loading last title(COD cuz it I already loaded it once through MM and dont load any others between plays)
Load SEN Enabler and delete history files(R2)
Exit SEN Enabler
Start game
Hit Play Online and finally sign into PSN
Been playing every night after work 9+ hours for a month and have yet to get either BO2 banned or console banned.
EDIT: 2 months later SEN Enabler still working flawlessly....so follow this post to get online until either a OFW update or PSN update. If that does happen PM me and ill let you know then if evilnats progger still works.