When I make a setup project in VS 2008, and select <Setup Project>, Properties, PreRequisites then i can select SqlExpress2005 to be automatically included.
What I am looking for is a walkthrough of how to get SqlExpress2008 included in the same manner.
Second choice would be how to get (or make) a MergeModule (MSM) file to do the same.
You'll need to get the bootstrapper installed. The recommended procedure for doing so it pretty idiotic.