XPS files are formatted documents like PDF files, except open source. Windows Vista includes an XPS reader, so you should be able to view it just by double-clicking the file in Explorer.
Unless you have Firefox installed. Then, Windows Vista will try and open it in Firefox, which will prompt you repeatedly asking how to deal with the file.
To view the XPS file, follow these steps:
If you need to edit your Start menu, just right-click the Start button, and then click Explore (to edit programs for just your user account) or Explore All Users (to edit programs for all user accounts).
The files that make up your Start menu and the groups are stored in a different location than they were in Windows XP. Programs installed for all users are now at:
Programs installed just for your user account are at:
Programs listed in both locations show up in your Start menu.