If you are looking to Deploy Project Server 2007 and MOSS 2007 on the same machines please read the below article
Updated: February 15, 2007
This article describes how to deploy Microsoft Office Project Server 2007 to an existing deployment of Microsoft Office SharePoint Server 2007.
This is one of three deployment scenario in deploying Office SharePoint Server 2007 with Office Project Server 2007. The other two scenarios are:
