waqas,
Taken directly from various TechNet articles: "It is important to note that
because Office Project Server 2007 is built on Windows SharePoint Services
3.0, the requirements that apply to Windows SharePoint Services 3.0 also
apply to Office Project Server 2007."
My experience is that you need to first install and configure WSS 3.0 before
installing MOPS 2007, even in a stand-alone (or single-server farm)
environment. The same approach applies to the July Infrastructure Update -
apply first the WSS 3.0 IU, then the MOPS 2007 IU.
I hope this helps.
- Gina Montgomery