Connecting BIDS to TFS2010 problem - dialog doesn't allow a path to be specified

I want to attach my BIDs (VS2008) to our Team Foundation Server 2010 to put the project artifacts under source control. I've installed the Visual Studio 2008 SP1 Forward Compatibility Update for Team Foundation Server 2010 so I get the dialog to attach to the TFS server, but it only asks for the name of the server. When connecting via VS2010 I get the option to add the path as well as the 开发者_运维问答server name which, evidently, is required to connect to our TFS server.

Is the URL/path saved to a solution or project file so I can hack it manually?

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The secret is to type the full URL to the TFS project in the dialog box - it just seems to accept it without attempting to parse it.