The 'cleanest way' would be to disconnect your Vista drive then install
winxp as per normal, if its to a sata drive you may have to use the F6
option to install sata controler drivers from floppy early in the
installation process.
Once done and updated, shutdown, reconnect Vista drive.
On booting you use the Bios options shortcut to select which drive to boot
from

"DavidG" wrote in message
...
Hi
I'm wanting to create a dual boot for my PC. I would like to use 2
separate
HDDs. One HDD has Vista Business (current) and the other proposed HDD
will
have XP. I would like to locate some good user-friendly instructions on
how
to do this by downloading from a web site, or maybe someone on the group
has
a set of instructions. Could someone assist please? Is there a good site
on
this topic?

I have tried Virtual PC 2007 but I cannot get the screen to enlarge to any
extent. Full screen mode fails every time I try it. Anyway, I figure the
twin HDDs would be the cleanest way to go. One more thing, I plan on
upgrading the Vista installation to Windows 7 when released, would there
be
issues with the dual boot when installing Win 7??
Thanks