I actually don't dual boot anything on my main computer, which is a Macintosh, instead I use Parallels Desktop
for Mac which is great for what I do because with no performance hit I
can simultaneously run multiple operating systems at the same time. Ya,
I know I sound like a Parallels ad but this is really great software,
it sure beats rebooting and all the complexity of messing with boot
options. Not to mention you can easily compact and backup all your
Guest Operating Systems and deploy them where ever you need them.
There
is a Windows version as well as a Mac version of this software but
unless you have an Intel or other processor with VT technology you
won't enjoy your experience as much. So the rule of thumb is that if
you have an Intel processor newer than and including an Intel Core Duo,
and at least 2GB of RAM, then your good to go as for AMD I don't know
what their VT technology offerings are but last I checked they where
about to produce something along those lines.