You're confusing yourself. 3.55 has CFW. 3.41 has jailbreaking.
dude. i have 3.55
and its jailbroken. and running homebrew/ its basically modded 3.55
Steps:
1)PLUG IN COMPUTER USB (CLEARLY U HAVE DONE THAT)
2) cut and paste onto desktop "CTP by markoshay"
3) nOw, u have 2 files on your USB, one is FTPserver_12_355.pkg and the other is the ps3 folder.
4) not eject usb from computer
5) remove power cable from ps3
6) insert usb flash drinve into ps3 usb hub while power cable is removed (POWER CABLE SHOULD BE REMOVED *SOS*)
7) insert power cable
8) switch on ps3 system from button on console, not controller
9) go to Settings tab on ps3's XMB menu
10) go to system update
11) choose "Update from storage device"
12) it should automaticaly find the "3.55-jb.pup" file, choose that
13) wait for it to load the jailbreak
14) it should restart, or smth like that,
15) go to the game tab once it is updated
16) choose "install package files"
17) instal FTP server
18) now you have a jailbroken ps3 with the FTP server on
NOTE:
FTP server = blackb0x
HOW TO CREATE A CHALLENGE LOBBY FOR MW2:
1) go to your FTP server.pkg (installed one) in the game tab
2) open it up
3) look at your ip given to you by the app
4) go to your pc
5) open up the program "FileZilla"
6) on the top left corner of the program, under "File" and the toolbar, it says host.
7) in "Host" type in the IP address provided by "blackb0x" on the ps3
8) click on quickconnect
*!PAY ATTENTION HERE!*
9)on the right hand side, you will see smth changed, those are your PS3 files.
10) navigate to dev(elopment)_hd0
11) navigate to game
12) then find the BLES you are using, found on the side of cover of your game box(cover or w/e) ~MOST PROB ITS BLES_0683~
13) then go to user directory
14) over ride the patch from the patches given to you