:
is it possible to dual boot vista and xp when:
a) vista is already installed
b) xp is on an extended partition
without having to reinstall vista
Yes, but you need to provide more specifics such as disk
and partition configuration, where each is installed, etc.
Also you should be posting this to a Vista newsgroup such as:
microsoft.public.windows.vista.general
microsoft.public.windows.vista.installation_setup
Do some searching through the posts in those newsgroups.
The issue of dual booting XP and Vista has been discussed
thoroughly many times.
--
Rock [MS-MVP User/Shell]
This one has the added twist of the Extended partition for
XP, which I believe to be a non-issue. As I dimly understand
installing XP AFTER Vista, the MBR of the HD controlling
booting has to be repaired for the Vista boot loader. But since
the Vista boot loader can boot XP as well as ntldr can, and ntldr
can boot a Windows OS that resides in an Extended partition,
Vista's boot loader should be capable of booting XP from an
Extended partition, too. Here's a recently posted link to a web
page that describes repairing the MBR for a Vista which had
been installed before XP was installed:
http://apcmag.com/5485/dualbooting_vista_and_xp
*TimDaniels*.