Print

[Heimdall]

You can put XBMC into error recovery mode by holding white and Y during startup, and that will give you ftp access. Use ftp to edit \XBMC\UserData\guisettings.xml and edit the <masterlock> section to say <lockcode>-</lockcode> and <startuplock>false</startuplock>

If that doesn't work, cold boot with a boot disc (Frosty's or Slayers), and use ftp to change guisettings.xml.

Alternatively you can reset XBMC by holding down both thumbsticks as it boots. I think that resets the lock along with all of your other settings.