Hi JB,
Did you install Biztalk before installing Visual Studio on your machine? If so, you will not see the Biztalk project templates when opening VS, so uninstall BizTalk and re-install it. When you open Visual Studio, and go to File -> New Project, you will see an entry for BizTalk Projects, which allows you to create a BizTalk project; when you add an Orchestration object to your project, you will see the Orchestration Design Surface displayed in the center.
Daniel.