/openProjects Opens versioned project. Requires three arguments: OptionalTfsServerCollectionUri VersionedProjectServerItemPath ...

/openProjects   Opens versioned project. Requires three arguments:
                OptionalTfsServerCollectionUri VersionedProjectServerItemPath
                OptionalSolutionServerItemPath
                If OptionalTfsServerCollectionUri is not provided, then an 
                attempt is made to use the current TFS project collection.