There was a tutorial I need and can find it anymore to quick install between TB,Cobra and another FW what you want. You put all FW you want to HDD and there was a debug option to install and you can choose fw to install from system update menu. if anyone find this tut please send here a link plz
Edit: found it
SCPH-50004 PAL with Messiah II Pro
PSP-3004 on 6.60 Pro-C
PS-VITA w 16GB on 2.02 UNO exploit (TN-V)
160 GB Slim PS3 (Upgraded to 320GB) on REBUG 4.46.01 with RR Linux v7
160 GB Slim PS3 (Dead while trying to DG)
And blocked PSN account(over £50 in wallet). DAMN $ON¥!!!