unpacked 4.00 firmware.

hey guys i unpacked 4.00 fw with cygwin and to my suprise it also unpacked core_os not decrypted.And whats strange is that i think i found the file resopnsible for playing the ps2 psn games on the ps3 slim,am just stating what i discovered thats all but sadly when i try to decrypt the self file it gives error so obviousily i dont have the 3.60+ keys to decrypt it.

I uploaded the files if incase u guys wanna take a look.