Instructions
Turn on your PS2 and insert an R-rated disc or any other disc that asks for a parental code.
Press the "Select" button on your controller when prompted to enter the parental code. The text on the screen will change from "Enter Password" to "Delete Password."
Using the menu on the screen, enter the code "7444." After inputting this code, the message 'Deletion Complete" should appear on the screen.
Press select again. You will now be asked to enter a new password. Input a new four digit password. After inputting it once you will be asked to confirm the password by entering it again.
Press select again and go to "Setup." Under the "Parental Controls" menu, select "Off."