Download the comapnion materials from http://download.microsoft.com/download/7/7/1/771d3e0b-96ce-41de-aa29-f31d953967ae/setup.exe.  Much, but not all, of the code has been tested against SP1 and, so far, no incompatibilities have been found.

Notifications of updates to companion materials for Programming Microsoft SQL Server 2005 will be posted here