Re: dual booting xp and vista
Eric- backing up files is a good idea. Installing Vista second is also a good idea. If you install XP second, its bootloader will screw up and not recongize Vista and essentially just take over all other bootloaders on your PC. Installing Vista SHOULD recognize your XP partition and allow you to choose upon startup. XP will be fine with running Vista on a different hard drive too, as long as they both understand their letters (who is C: drive etc).
also, you wouldn't disconnect the other hard drive every time you want to use one. the two can run alongside eachother pretty well, you'll probably even be able to access files from the other HD. Setting up a shared home directory so that your Vista and XP basically have the same personal settings when you logon is also an option.... but i'd say start with installing the two together first :P
If you're looking for a bootloader that doesn't suck, GRUB is SO much better, but it does require some more configuration
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