I have been using Win7 RC1 on a spare computer for a couple of months - quite happy with it. Bought Win7 Ultimate last week and installed it on a second drive in my main computer as a dual-boot with XP Pro. On boot up I get the choice of "Old operating system" or "Windows 7", which is highlighted by default. If I do nothing it boots into Win7. At the moment I would prefer it to boot into XP by default. How do I change this, please?