I have a dv6000 HP laptop with windows vista home in it.I am trying to install windows xp pro in to it .But it says no disc present.I do not have a laptop restore cd. Please ny one guide me how to do a format and install of xp pro on to it? It came with vista homewhich I am not able to a domain.So I prefer windows xp pro so that I can add it to the domain and I dont want to spend extra money to upgrade vista.