Undoing a Dual boot Viat X64 and XP

Undoing a Dual boot Vista X64 and XP

Hi
I currently have my system set up to dual boot XP MCE or Vista Utlima X64
The XP was the orginal sytem on the computer. I added a second hd and loaded X64 on that drive.
I really like the Vista and want to get rid of XP. my question is how do i break the dual boot so that the computer will only boot up to vista and i can reformt/erase the XP drive to use a a second drive.
Vista is the default if i just let the boot manager run..
thanks

You can do that by "Vista Boot Pro"

or from msconfig

I get an error message when i start up boot pro about not finding vista but then it will load...
How would i go about doing this using either method

Figured it out now have vista on the C: drive and formated the old xp drive...