A couple of users on the Project forums have run into issues getting the Project Server Demo Pack to install onto the 2010 Information Worker Demonstration and Evaluation Virtual Machine. On the surface the demo pack appears to install without issue. But when you try to navigate to http://project.contoso.com/PWA you get the dreaded ‘An unexpected error has occurred’. On navigating the Central Administration > Application Management > Manage Service Applications > Project Server Service Application and checking the provisioned Project sites, it appears that no Project Server Web App sites have been provisioned, even though the demo installer reported it was successful.