How to remove screen 'Please select the operating system to start' after Ghost 15 drive copy

After using the Ghost 15 'Copy My Hard Drive' facility to copy a Windows XP Professional installation from an old IDE drive onto a new SATA drive I am getting a screen appear on boot-up saying

      Please select the operating system to start

            Microsoft Windows XP Professional

            Windows XP/2003

      Use the up and down arrow keys......etc

 

Such a screen never used to appear. I think I might have initiated it by letting the PC see both the old drive and the new drive at the same time after I had done the copy.

 

If any one can advise me as to how to get rid of the screen I will be very grateful.