New Projects using Blend vs Visual Studio
Just a heads up. Currently, creating new projects using Expression Blend (v 1.0.1.083) and Visual Studio 2005 (v 8.0.50727…) differ dramatically. Besides the obvious naming differences, the Visual Studio windows application template includes many more references than the Blend standard application template. Also the Visual Studio templates treat project properties files differently by placing the files inside of the Properties folder. The Blend template simply adds a generic AssemblyInfo.cs file that states “Do not modify.” In general, I would start with creating the project in Visual Studio, unless I’m creating one-off prototypes.
New Project in Visual Studio

New Project in Blend

Blend Tip: Quickly Change The Startup Window
The startup window can be changed in Expression Blend by right-clicking on the new window that you want to to the startup, and selecting the Startup menu item in the context menu.
Alternatively, you can just as easily modify the StartupUri property in App.xaml to point to a different window.