Instructions
Insert a DVD into your Sony PS2.
Press the "Select" button on the controller after the DVD begins playing (the ">" symbol will briefly display on the upper-right side of the screen).
Scroll to the "Briefcase" (Setup) icon. Click "X," and then select "Custom Setup."
Scroll down to "Parental Controls." Enter your current password.
Scroll down to "Change Password" and hit "X." Enter your new password, then re-enter it for verification.