Where to find these files?

[Andyrew_92]

I'm looking in iFile for the files that create the "ok" button and the "cancel" button in my lock screen. I want to make them transparent so all you see is the black or white text. Also I need to find the background for my unlock slider so I can make that transparent, I would use winterboard for this but it slows down my iPod. If anyone knows where these files are in iFile it would help a lot