Fixing Master Boot Record (MBR) in Windows XP without the recovery console (equivalent of fdisk /mbr on XP)

The solution to this problem is given here: http://eivind.dataweb.no/?p=13. In essence the solution is to use a utility named MBRFix available here: http://www.sysint.no/products/Download/tabid/536/language/nb-NO/Default.aspx