如何为Visual Studio 2008默认设置源控件插件？

We recently installed Team Foundation Server 2008 and we are using it for both Visual Studio 2008 code and Visual FoxPro 9 code that we are still migrating to .Net. I had to install the TFS MSSCCI provider to get connectivity from the VFP9 IDE. That works fine, but Visual Studio now seems to get confused about which source control plug in to use and keeps reverting to the TFS MSSCCI provider instead of the "Visual Studio Team Foundation Server" plugin that installed with Team Explorer. When the plug in changes, I get errors when trying to get/check in code from TFS. How can I get Visual Studio to keep the Team Explorer plug in as my default?We recently installed Team Foundation Server 20