HowTo change the bootsound in FW 3.5x

1.)  Decrypt your 3.5x opening_plugin.prx
2.)  Create a custom bootsound(VAG or ATRAC3) using some sound editing software.
      Make sure the filesize is less or equal 49376-bytes. If it's less
      then pad it until it's exactly 49376-bytes long.
3.)  Open your opening_plugin.prx with your favourite Hex-editor.
      Select from offset 0x424A to 0x10383 and overwrite it with your custom bootsound file.
4.)  Flash your new opening_plugin.prx and have fun with it :wink2:
      Backup your original opening_plugin.prx !!!