I read on MSDN Forums that it is not possible to use other configuration than Release and Debug. This is wrong.

I am using it for Tech Head Brothers Portal, what you have to take care of is how you set your configuration. On the following picture you see how I defined a new Staging configuration and set the Web Deployment Project WebApplication.csproj_deploy to build using this configuration.

My old build script wasn't working after the migration to this new version and you will find in this post the different adaptation that I had to do.

Add missing ToolsVersion as following:

Users can install Microsoft Office solutions by opening the deployment manifest from the Web. However, a secured installation of Internet Information Services (IIS) will block the .vsto file name extension. The MIME type must be defined in IIS before you deploy Office solutions by using IIS.

http://msdn2.microsoft.com/en-us/library/bb608629(VS.90).aspx

I am currently migrating Tech Head Brothers Authoring tool to Visual Studio 2008! And found this cool feature, it is crazy that you use a tool for quite some time (VS05) and always find little trick like that.