It may have been this order instead:
PS3: Delete all game-data from mw3
PS3: I installed the fix-bundle of 1.19-1.20-1.21 (100MB) [the ones you supplied worked]
PC: then I downloaded the originalpatches 1.22 and 1.23 for MY version: bles01431 (you do yours ofc) [still used yours]
PC: Extracted both, copied 1.23 over 1.22 (overwrite all files). [used ps3 tools]
PC: Extract the new nodrm 1.23 fix and copy &replace to the folder from above (EXCEPT PARAM.SFO) [only 3 files]
PC: Edit the PARAM.SFO (which would be the one from 1.23-original) to set FW-ver to 3.40 ->save/replace [i did 3.40 and worked fine for me]
Then copy all files over to your ps3 to dev_hdd0/game/BLES01431 (you do your ID ofc)
PS3: Mount game(for online FckPSN is needed ofc)
PS3: installed mw3 patch v103 (zombiekillah) [it gave me an error and wouldn't boot correctly after mount]
PS3: launch game djluiluv
As for the multiplayer maps, that's the current problem I'm having now. When I attempt to access multiplayer, it says I need to download the free maps. It redirects me to the PSN store. I then attempt to download a free DLC (i.e. terminal map) and keep getting the "error occurred during install operation 80029780" error. After doing research, I came across this link: nextgenupdate.com/forums/playstation-3-exploits-hacks/print-593497-how-fix-error-80029780-a.html
This error occurs when you try to download something from PSN on 3.55 Cfw Ps3 using FckPSN
Also can occur from other things >:<
Just change the email on the 3.55 Ps3 in the XMB
Turn restart your ps3 and then it should work!
Let me know if it worked for you. It did for me !
So I tried changing my email, rebooting ps3, logging in, and attempted to grab a free DLC but no joy. If all else fails, I may have to resort to Levyn's approach. I just don't like the fact you have to keep reinstalling the pkg and eboot fix.