Ok I've been testing away at this and am the tester kamel is talking about..
The File Structure to get this to work is very basic..
This is how the game should be installed on your PS3 (I suggest Multiman's Built in FTP Service )
1. The Entire PS3_Game Folder from Madden 11
2. The Entire PS3_Update Folder from Madden 11
Now Change/Overwrite these 6 Files in Madden NFL 11's PS3_GAME\USRDIR to the same files from Madden NFL 12's PS3_GAME\USRDIR
Madden NFL 11 Versions
Madden NFL 12 Versions
The game will boot just fine and show the intro movies the only problem I've had is that when you go to load the game and it auto saves the game goes to a black screen I'm working on fixing that by bubba's advice he suggested to change the PARAM.SFO file's Title I.D and Title to that of Madden 12 but I'm having an issue with it displaying a "Corrupted Data" message that he never experienced.. To change the PARAM.SFO you need to use PS3_SFO_EDIT because Notepad WILL NOT WORK
PS: I'm also working on fixing trophies but I need to fix the Saving Problem and the Corrupted Data Problem