Archived from groups: microsoft.public.windowsxp.customize (More info?)
Windows XP Professional is an "operating system".
Office XP is a software application that you install
in the operating system. You need Windows XP
in order to install Office XP. So to answer your
question, do not uninstall Windows XP. Install
Office XP like every other piece of software you
have already installed.
Windows XP - Shell/User