Hi,
You need the Vista bootloader to load the OS. What boot managers do (like
BootIT NG) is to basically insert themselves into the startup process. The
mbr is rewritten to load the boot manager instead of the OS bootloader. The
boot manager then loads the bootloader of the OS chosen by the user. This
process allows each OS on a multiboot machine to still think it's in charge,
and also allows for placement of the bootloader of each OS onto the booted
volume. Without one they all attempt to load their bootloader onto the root
of the active partition and rewrite the mbr to point to it. If the
bootloader supports other OS's and can recognize and load them that's fine.
If not, then you have a problem.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org