Hello Everyone. I've searched the threads and have come close to finding an answer, but no cigar. I have two hard drives in my desktop. One HD has a working Ubuntu system-hence the ability to post here- and the other contains Windows XP Pro. When the XP drive crashed I was able to re-install an image I had saved using Acronis. Unfortunately the dual-boot option at startup is no longer available. I can only boot to Ubuntu. Not so bad really but there are some programs on Windows that I need to use. Is there any way, using Grub perhaps, that I can reconfigure an MBR to include the second hard drive and the Windows system?

Yes but you need to tell us why after restoring Windows you lost the dual boot.

When you boot one of the two hard disks has to be nominated as the first boot disk and the dual boot is in there. Restoring Xp on the second disk should not affect it, unless you are changing the disk order in the Bios.