[Microsoft Microsoft Office Professional Plus 2007 12]

http://support.microsoft.com/kb/940289/en-us

Description of Office Compatibility Pack Service Pack 1

Just like Visio Viewer 2007, the Office Compatibility Pack 2007 SP1 is just a Service Pack which is almost as big as the original. You need to install the Compat Pack, then SP1. Hopefully Microsoft will reissue this as a standalone pre-patched installation.