Help with Unlock sounds

[ObeliskPhysics]

I have edited my unlock sound using winterboard. I use passcode and wonder if it is possible to customize the sound that iphone makes when someone enters the wrong passcode. Is this possible? i want to add a "access denied" type of thing.... :)

[HackThatPhone]

I have a tutorial on changing out system sounds. Provided you can find the audio file on the phone, you can change the audio contents of that file. Read more here: http://www.hackthatphone.com/20/custom_audio.html

[ObeliskPhysics]

I have read http://www.hackthatphone.com/20/themes_with_winterboard_section11.html but none of the file names seem to have changed the sound (it vibrates when you enter wrong pass code, I'm trying to replace the vibrate with a sound)