How to install Windows XP over Windows Vista

How do I install XP on top of Windows Vista?
I really don't want to wipe out my Vista installation because I desperately need XP to run these two specific programs that just won't work on Windows Vista,
I want Vista to stay as my main default Windows, so is there any way to get XP running while Vista is already up and active,
I’m looking to do a standard installation of XP—and please, I definitely don't want to deal with a virtual machine or VMware (so no virtual machines, please!)

I'm planning on carving out a partition for XP of maybe about 15 GB or so, since I won't be doing much on it anyway.

Bryan Palmer9 said:How can I install Windows XP on top of Windows Vista?
I don't want to wipe out Vista because I need Windows XP specifically for two programs that just won't run on Vista.
I want Vista to remain my primary operating system. Is there any way to install XP while Vista is currently running?
I'm looking for a standard installation; I don't want to deal with Virtual PC or VMware (so, no virtual machines here).

I'll set aside a partition of about 15 GB for XP since I won't be doing much on it anyway.

It's pretty straightforward—just create two partitions, keep Vista on one and XP on the other, and you're all set.

Jack Garcia said:Just split your drive into two partitions, put Windows Vista on one and Windows XP on the other, and you're golden!

Man, it's actually not that simple because everyone keeps telling me I have to install the older OS first before moving to the newer one.
But I really don't want to wipe my Windows Vista installation—I’m trying to run the new one right over the top of it.
Could anyone who's actually pulled this off tell me the exact steps I should follow?

I need Windows Vista to be the main OS by default.

http://www.syschat.com/dual-boot-vis...eady-1946.html