Hi, Gernot.
I would say that it is doable - but only if you really know what you are
doing and are really careful. But if you did know, you probably would not
be asking in a public newsgroup. I'm sure you know that it is NOT
recommended, by Microsoft or anybody else I know.
I haven't thought this through, but: Could you shrink your Vista partition,
create a new Drive D: and install WinXP there, then delete Drive C: - no,
that's your System Partition AND holds the data you want to keep. You could
boot into WinXP (on D

, delete C:\Windows (Vista), then install WinXP on C:
and, finally, delete your new Drive D: and Extend C: to use that space
again. But all that sounds like more work than just keeping D:\WinXP. The
data can stay where it is; you will have to reinstall your apps in any case
and you can point them to the actual location of the data. Oh well, it was
just a thought.
Or just wait a few months and install Win7! ;<) Many beta testers say that
it runs WinXP apps in a virtual shell beautifully. I've been using Win7
since October, but I kissed WinXP goodbye years ago, so I can't verify that
claim.
RC
--
R. C. White, CPA
San Marcos, TX
Microsoft Windows MVP
Windows Live Mail 2009 (14.0.8064.0206) in Win7 Ultimate x64 RC 7100
"Gernot Frisch" <> wrote in message
news:...
> Hi,
>
> I have a PC that causes trouble with Vista (old software does not run and
> stuff), so we want XP instead.
>
> My plan ist to install xxp into C:\WINXP side-by-side with the C:\WINDOWS
> of Vista, and remove vista afterwards. So I don't have to split the
> partition and can leave data untouched.
>
> Is it possible?
>
>
> --
> ------------------------------------
> Gernot Frisch