Just don't replace the param.sfo if you have one included with the fix, and let the game manager fix the .sfo for you (when you launch the game the first time, it will ask you if you want to edit the sfo, answer yes. It will replace the min-required version with "3.41").
If the fix still doesn't work for 3.41, there are two possibilities:
- The eboot and other files are signed with a 3.55 key : You can use the eboot_fix.exe program yourself to un-sign them.
- The game use a function which didn't exist on a 3.41 firmware. You can't do anything about that
About games not working externally, there's nothing you can do except placing them on the internal HDD.
















