(make sure you backup all your files first in case you do something wrong)
Step 1: Download the files and go to where you put your game and edit your pram.sfo to say 3.40 with PS3SFOEdit.
EXAMPLE OF WHERE YOU MAY HAVE PUT YOUR GAME:
Step 2: Update the game to 1.02 using the retail update for your region.
Title ID - BLUS30591: http://b0.ww.np.dl.playstation.net/tppkg/np/BLUS30591/BLUS30591_T1/e3a3ed7da8ea52fb/UP0002-BLUS30591_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Title ID - BLES01035: http://b0.ww.np.dl.playstation.net/tppkg/np/BLES01035/BLES01035_T1/f3208a72c5905392/EP0002-BLES01035_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Title ID - BLES01032: http://b0.ww.np.dl.playstation.net/tppkg/np/BLES01032/BLES01032_T1/0036efc1b6e9aeaf/EP0002-BLES01032_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Title ID - BLES01033: http://b0.ww.np.dl.playstation.net/tppkg/np/BLES01033/BLES01033_T1/58898b36ad3011c1/EP0002-BLES01033_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Title ID - BLES01031: http://b0.ww.np.dl.playstation.net/tppkg/np/BLES01031/BLES01031_T1/6a49eecc0796b10e/EP0002-BLES01031_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Title ID - BLES01034: http://b0.ww.np.dl.playstation.net/tppkg/np/BLES01034/BLES01034_T1/a4df11340e14a452/EP0002-BLES01034_00-CODBLOPSPATCH001-A0102-V0100-PE.pkg
Step 3: After your update has finished, open comgenie or ftp and go to:
dev_hdd0/GAME/"Blackops"/PS3_GAME and put the eboot in the pack here
To clarify, in other words: dev_hdd0/GAME/"Blackops"(BLxxxxx)/USRDIR and put the eboot in the pack here
Step 4: Go to dev_hdd0/GAME/"Blackops"/PS3_GAME/USRDIR
Now if you have the BLES01032 version just use the SFO.PRAM file inc in my pack and place it in that directory overwriting the old one.
If you have another version of the game use PS3SFOEdit to edit your sfo to say 3.40 in advanced edit. SAVE IT then replace it.
To clarify, in other words: go to dev_hdd0/GAME/"Blackops"(BLxxxxxx)/ and copy the sfo.pram file to your pc.
To edit the sfo file use the sfoeditor i've inc in my pack click load and choose your PRAM.SFO file.
Click Advanced Edit where it says 3.5000 change this to say 3.4000 and press ok. press save and save it to the desktop or somewhere you will be able to see it easy. now either put it on a usb drive and copy it back with comgenie or ftp it back to the folder it came from.
Step 5: Double check everything, Then play.
The next part comes from hunter128 from here and seems to only apply if you have run the game previously and been prompted to update.
After you install the pkg launch a FTP server and go to /dev_hdd0/mms/db/ and search a file called metadata_db_hdd open it in a hex editor and search 3.50, and change to 3.41
REBOOT OR YOU WILL GET EITHER A ERROR OR BLACK SCREEN.
Big thanks to teh reaper for testing this and confirming it working on external and internal HDD.
Also it seems that multiplayer freezes at the moment, but campaign and zombies works fine!
This is the way that works atm I'm sure there will probably be a simpler way soon.
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
Let me help, erase all COD:BO files from ps3 (game data utility,metadata,etc.)and start fresh by powering off then on. Download the 1.02 update from link for your region (mine was Title ID - BLUS30591:...pkg) and install .pkg (should now see it in game data utility).
Next, go to dev_hdd0/game/blus30591/PS3_game (note: this is game not GAMEZ section, two different directories), downloaded the Black ops pack from: megaupload.com/?d=RFJ4NUNH and use the eboot right here (dev_hdd0/game/blus30591/PS3_game (note:this is game not GAMEZ section)).
Next go to hdd_0/game/blus30591/PS3_game/USRDIR (note:this is game not GAMEZ section) edit the param.sfo in this directory to say 3.40. Next go to GAMEZ/BLUS30591/PS3_GAME and edit this param.sfo to say 3.40.
Now all that is left to do is go to dev_hdd0/mms/db/metadata_db_hdd. Modify this with hex editor app by first using search to locate files saying 3.50 then changing them to 3.41 (note 3.41 not 3.40). Save all changes and VOILA!!! Black Ops!! +rep if you found this helpful!
i've read through much of these posts got a headache now, i've got minmus avr usb v1, i am on 3.41, now please can someone tell me what spoof 3.50 fw i should use as i've used all i think of and none of them work on black ops original retail disc.