I suppose a good question here would be ,"it's detected, but is it working"?
Drives that are in the process of going bad seem to have good days and bad days. The term "flaky" springs to mind.
If the drive is in fact working, and you are able to burn with it, why not wait until its next "episode", to begin diagnostic attempts.
If the problem is registry filters, (as LookinAround's tutiorial involves), the most common symptom(s) are issues with accessing the drive for burning. (Disclamer: "I think")!
In most instances you should be able to do anything with a USB "thumb drive" that you can with an optical, save perhaps the obvious, playing a DVD directly. Some software will play a DVD-Video from a folder on your Hard Drive, thus negating the need for an optical drive altogether. Hey look, this seems like a cop out, but the $1000.00 plus Mac Book Pro doesn't even ship with an optical drive, nor does any net book I'm familiar with.
Part of your decision to replace the drive, (if that should prove necessary) would be if this laptop is your only machine. Even if it is, I would offer the alternative of buying an external drive, that you could work with from home.