Hi, sorry if this question has been asked before but I would be grateful for any help.

Basically I had a perfectly good XP computer before a motherboard failure. My parents kindly bought me a basic vista computer for christmas, unfortunately not including the vista cd. I installed my old xp drive and disconnected the vista drive and I've been happily running xp since then.

Now I've decided to pull my finger out and actually get the Vista drive up and running so reconnected it but I can't make Vista bootable while the xp disk is still connected. I stumbled on some advice to install Vist boot pro, which I have done, but all I get is a lot of errors my BCD registry is missing. What should I be doing?

Cheers