Is it possible to install windows xp from an external dvd drive? I have a dell dimension desktop e521 (purchased in may 2007) and a Windows XP Home Edition Service Pack 2 reinstallation cd. I'm planning to try the usb flash drive method first and if that fails I'll try a memorex external dvd burner which has been problematic in the past (computer sometimes won't recognize it and I have to unplug it and restart). If that fails is there any reason to try a different external dvd drive or should I just skip to the next step and replace the computer's internal dvd drive?