dual boot not working my mistake

It was silly of me to install Vista over my existing XP rather than waiting for my new & 2nd HD to arrive - but I did it.
I got the new drive and installed Vista from scratch on it.
Now I can not boot into the first Vista installation (the one I did over my XP).
What is the best (i.e., fastest) way to get the dual boot working?
Thanks for your help!

From a XP installation install Vista on second HD (again install from within XP) - Vista will (should anyway) set up a dual boot situation. I am sure you will remember to never install beta software as an upgrade.
"CJB" wrote in message

It was silly of me to install Vista over my existing XP rather than waiting for my new & 2nd HD to arrive - but I did it.
I got the new drive and installed Vista from scratch on it.
Now I can not boot into the first Vista installation (the one I did over my XP).
What is the best (i.e., fastest) way to get the dual boot working?
Thanks for your help!