You will need to partition your hard drive with at least three partitions.
You C drive should be about 700 MB. XP should be on your second partition
(D) and Vista on your third partition (E).
Take a look at the screenshot I provided a link to.
http://home.cfl.rr.com/jbmsbink/VistaInstall.jpg
You will need at least 15GB for the Vista partition according to Microsoft.
You will get a selectable boot screen when Windows Starts. It will say
Earlier Windows and Windows. Earlier is XP and Windows is Vista.
I have been using a triple boot including Vista for three days now, and I
get no interference with 98SE or XP Pro from Vista. Again, I do not have an
operating system of any kind on my C drive.
Joe
"DJjay" <> wrote in message
news:BEC72A0D-7148-40C7-A2E9-...
> So, if I partition my disk, will I be able to clean install Vista Beta and
> use both systems, ie WinXP for day to day operations, and Vista to try it
> out. Will they interfere with eachother?
>
> If I partition, how much room will I need in the Vista partition?
>
> And finally, can I get a selectable boot option screen at startup?