I have here a desktop with two sata drives. The first one (C has XP and the second (D Windows 7. If both drives are connected to the machine, it will boot XP; to boot Windows 7 I have to remove the XP drive which is a bit of a drag. So, I would like to be able to select which OS the machine will boot from. Searching online I find tons of examples of setting a machine whose primary (for a lack of a better word) OS is Windows 7 to dual boot with XP, which is exactly the opposite of what I want to do. Short of installing grub, is there a windows way to do this? I was also told that editing a boot.ini file in the XP drive would do the trick, but I could not find the said file. What else should I try?