PS3 OFW Methods and some older games that work on PS3 OFW 4.81 without a second console on Custom Firmware, it's time to reveal the final method to running PlayStation 3 game backups on 4.81. NO CFW/ODE/another bs.
Be careful, there is a very high PSN ban risk. Already I lost few IDPS while online by testing this method. If you get banned on undowngradable console you got ban forever. Prefer to stay at 4.70 or to play offline.
This method I found few months later I decided to publish.
1. Put an original disc to your PS3. This game should be released after 2012! (these games already have lic.dat).
2. Download any game what you want.
3. Download game patch to this downloaded game.
4. Unpack patch to downloaded game replace everything you can.
5. Open now param.sfo
6. Change Title ID to your original disc game. Example I put to PS3 Uncharted 2 so I change title id to: BCES00757
7. Rename PS3_GAME folder to your original disc game on PS3 TITLEID Example BCES00757
8. Inject with TABR.
9. Start your game from BD. Now PS3 will start your game from patch.
Enjoy you tricked PS3 and launch another game from patch.
Nice security. LOLz.