Installer vista par dessus ubuntu

Bonjour,
Comment faire pour installer windows vista par dessus ubuntu9.04?
Car lorsque j'installe le cd vista et que je clique l'application, il y a un message d'erreur qui s'affiche le voici:
Vista home/setup.exe
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
note: /media/cdrom0/Windows Vista home/setup.exe may be a plain executable, not an archive
zipinfo: cannot find zipfile directory in one of /media/cdrom0/Windows Vista home/setup.exe or
/media/cdrom0/Windows Vista home/setup.exe.zip, and cannot find /media/cdrom0/Windows Vista home/setup.exe.ZIP, period.
Merci pour votre aide