lt 2.0b i flashed it and it still plays older backup fine but it doesnt read xdg3 games it jus gives me the disc unreadable error im usis the newest jf and firmware 2.0b but the question i have is how can i be for sure that its loading 2.0b instead of 2.0 bc it says 2.0 regardless if i load 2.0b or 2.0