If you want to do a clean install, and maybe a subsequent repair install to
solve for startup problems, you need a DVD drive. These utilities are
available as a choice when booting from the DVD. That is why one of the
requisites on the Microsoft web site for Vista is to have said drive in the
computer.
You may be able to fudge a clean install from the expanded Vista files on
another partition on your computer, but even if you could it would likely be
an extremely slow install.
If you can load the expanded files across a network to another partition on
your computer you can perform an upgrade install.
Final thought. A computer without a DVD drive is likely to be substandard ,
in other ways, for Vista.
--
Regards,
Richard Urban
Microsoft MVP Windows Shell/User
(For email, remove the obvious from my address)
Quote from George Ankner:
If you knew as much as you think you know,
You would realize that you don't know what you thought you knew!