You're welcome. Here is another way a colleague of mine found to verify SP1
on the Windows Server machine instead of going to Central Administration.
1. On the Windows 2003 Server on which you are checking the Office
Project Server 2007 version, click Start, click Control Panel, and then
click Add or Remove Programs.
2. On the Add or Remove Programs page, in the list of Currently
installed programs, click Microsoft Office Project Server 2007.
3. Under Microsoft Office Project Server 2007, click Click here for
support information.
4. In the Support Info screen, check the Version number. If SP1 for
Office Project Server 2007 is installed on this server, the version number
should be 12.0.6219.1000.