I use a utility called XRAY which you will find in the OS X software section of the Apple site. Easiest way there is to click on the Apple Menu (top left of screen) and choose Mac OS X Software. It will take you to the site. You will find XRAY in the System Utilities section
I'm running OS 10.2.8 and a folder in my Users directory has suddenly become invisible. it contains music used by iTunes which can still access the files. how do i make this folder visible.