ERROR_PATCH_PACKAGE_OPEN_FAILED 1635 This patch package could not be opened

ERROR_PATCH_PACKAGE_OPEN_FAILED 1635 This patch package could not be opened. Verify that the patch package exists and is accessible, or contact the application vendor to verify that this is a valid Windows Installer patch package.
Publisher 2003 and the rest of Office 11 all installed, Windows XP Home SP1. In Publisher > New Publication > Business forms > Invoice > I get several choices, but when I try to load one of them, I get the error alerts:
"Publisher cannot run this wizard. This feature is not currently installed. Would you like to install it now?"
When I try to install, even with the Office CD inserted:
"Publisher cannot run this wizard. Microsoft Office Publisher cannot install the necessary files due to Windows Installer error 1635."
What's wrong with the installer and how can I install the invoice templates?
