Getting Playstation 2 Software Emulator working:
Method (on Firmware 3.55, without! Cobra-USB Dongle or Downgrade) for all consoles (fat & slim).
Replace following files on your consoles /dev_flash/ with the ones included in this archive p3dwik-ps2compatfiles.rar
Get into Factory Service Mode (FSM Tool/Dongle)
Insert your Original PS2 Game Disc
It will run.
Note: Backups wont work. You're getting the compatibility of the 2.60 software emulator with all of its bugs.