When working with Visual Studio and adding a reference to a project you are presented a window with multiple tabs; .NET, Project, Recent, and Browse. What is needed to get
You need to add a registry key like:
[HKEY_CURRENT_USER\SOFTWARE\Microsoft.NETFramework\AssemblyFolders\MyAssemblies]@="C:\MyAssemblies"
You can see more on this at: http://support.microsoft.com/kb/306149