I just bought 2 Precision 390 machines for a good price, and i'm looking to install Vista on them, but when i go to boot from the install DVD-RW i have, it responds as there being no boot device available. Now if you go into the BIOS, it sees the DVd burner that's installed, but but it lists it as a CD-ROM drive, and not a DVD. Could that be the problem? How can i get this to work? Thanks