RE: Three is a crowd?

Yes, I'm using XP Pro SP2.
I have been thinking about installing XP first.
But I would prefer to have Vista on C: and XP on D: so I can get rid of XP once all my programs have become compatible with Vista.
Can I do a clean install of XP on D: first and then instal Vista as primary OS on C? [I'll check your other tutorial]

Also, any idea why currently windows boot mngr keeps giving me the missing or corrupt hal.dll notification?

Thanks,
Ned