You asked this in the CD/DVD ROM forum and I replied there!
But... here it is again... (I have a Lite-On DVD writer too)
Changed the front bezel last night - it was very easy.
The drive tray face simply slides vertically up off the tray itself (it's held in place by a couple of click tabs, but these don't need much effort to release.
The face of the surrounding bezel is a little trickier, but not much. It's held in place by three click tabs - one on each side, and one on the bottom (IIRC). A small flat-head screwdriver helped me here!
One point to note - the tray cover prevents the bezel cover coming off if the tray is in the drive - make sure the tray is out when you try to swap the cover!