I've got a 2x2.8 Quad Core Intel Xeon (running 10.5) in which the optical drive has packed up. Simple repair I think - just buy a new drive and fit it (or get someone to fit it.) Well, having just phoned around - replacement drives are a rare as hens teeth. I'm in the Uk and everyone I've tried seems to be out of stock, with no idea when a suitable replacement will be found. (I need to sort something in the next day or so...) Can I get an external and use that? Can anyone recommend something mac compatible? (I've had a poke about on Amazon and while they look quite cheap I really don't just want to take a punt and end up adding to my growing collection of useless and dead drives). Also - In an emergency can you use such an external DVD drive to boot from?