There is plenty of information out there about how to set up a dual-boot with XP and Vista. The result is that XP sees the Vista partition and vice versa. That's not what I want. I want two comletely independent installations of either OS; XP should not see the Vista install, and Vista should not see XP. Using a boot manager such as OSL2000 or Acronis Boot Manager may come in handy. But I have not found any information about this type of installation. With XP installed already, I tried hiding the XP partition and then booted from the Vista DVD but this didn't work. Any ideas?