This is the final version of the Android 4.0.4 ICS for Optimus Black. Downloaded and converted from LG server francuzkiego:
* = t
1. Download file V28A_P970.zip and SFT.rar
2. Unpack files with Winrar or 7zip
3. Run B_SmartFlashTool_Extern.exe
1) ROM copy D/L bookmark
2) in Select mode choose Normal mode
3) choose CP file: LGP970_V28A_00_CP.fls
4) choose AP file:LGP970_V28A_00_AP.bin
*) connect phone in S/W Update mode with battery in it (on the phone that is switched off, plug in USB cable WHILE HOLDING Vol+ button)
5) choose COM port.
6) choose LGE Mobile USB Serial Port in Communication Driver
7) click Start and wait till end.
It takes about 3 mins to flash.
I tried Rom, Multi version, it works flawlessly