@Xx_Tawwqeerr_xX you are being vague about your problem, after reading all those posts. But, you don't need to patch the game so it will work. You only need to patch if you are on a lower firmware version, at least, was what i always did (it's been a long time since i don't patch for lower firmwares, because never needed since the 3.55 days or back in late 2012 early 2013, unless a particular game had some issues and you had to patched it).
1 - Where do you see 4.20 fw version? On multiman system inform.?
2 - When that started to happen (your issue)?
3 - You always played that game without any issues or this the first time you are playing it and you can't?
That's a simple fix and you might be looking to the wrong stuff. I've tried that game from disc and from backup without issues on CEX or DEX fws (if the update fails to download (for any game) when i boot that game i use aldos PS3 GAME UPDATES tool and "manually" install it).
If it isn't working from disk, copy it to internal (already posted). If you can't copy it you might be on a old version of multiman (it will work with that cfw but some functions won't). Go to brewology and get multiman 4.82 (and/or IRISMAN 4.82) and try with it and see if something works. That might be easier than you think, imo.