Ok, time is coming for my first WPF project :). I work before with Flex and PureMVC and I know how project setup is important in RIA's. I decided to work with MVVM. And decided to work with PRISM framework. Application is somethin like operating system. There will be 'shell' (parent for smaller applications). Smaller application I plan to make like modules. So I plan to design structure of project something like this.

Module_A {view, viewModel, model, assets} // for example calculator Module_B {view, viewModel, model, assets} // notebook

etc I read prism doc and I see that parrent for all this modules should be shell project, and this is my main question here.

Parrent_Project {App.xaml, Bootstrapper.cs, Shell.xaml}

Because this shell will be fullscreen with background images (like operating system), right click with some features. Is that ok to create folder structure like in modulesXYZ for Shell.xaml here? I want to start project with good structure so any advice is welcome. Thanks