Según la última noticia,el parche de true blue para downgrade ps3 se publica.es excelente.los usuarios que hacían downgrade PS3 con E3 Flasher,no podían utilizar True blue, el dongle puede jugar a los juegos 3.6X+ en PS3. Hasta ahora, cuando Kado ha publicado un parche para que puedan hacerlo.
las instrucciones de usar true blue para downgrade ps3

If you attend to downgrade 3.56+ console and use TB dongle after that then use this steps (if you already at Rogero CFW V2.0 do the same steps also):

1 - Dump your NOR flash using Progskeet first if you didn't have a good dump from your console.
2 - Download patch file attached to this thread.
3 - Extract this file and you will get 4 folders use patch in folder "Coba_2" to patch your dump using WinSkeet.
4 - Apply this patch to your dump then flash it to your console.
5 - Enter a Factory Service Mode using any method you like.
6 - Use TB CFW with Lv2diag.self to flash your TB CFW in FSM.
7 - Start your console normally, if it brick just dump this NOR flash again then patch again using "Coba_2" patch.
8 - If it still bricked use "Coba_3" patch to patch your dump again then flash it back to your console.
9 - Start console normally, now your console can run TB CFW on downgraded console.
10- Power off your console, plug your TB Dongle then power it on again and enjoy .

Credit goes to Kado for this patch
Also a very big thanks goes to:
Abkarino (Me kado gives me this not me),nice69, uf6667, rogero,muggi, eusnl, ago, and all ppl.