Managing Change Requests with Content types

Your team can manage change requests with SharePoint by Using Office templates and Content Types. First learn how to enable and use content types with SharePoint:
Here is a good article on how to do that:

http://www.bobmixon.com/blog/Lists/Posts/Post.aspx?ID=44

You can then add custom workflow to the document library so that every request that get made gets routed to the PMO and Project Server administrator.