[W]hen you latelly add new add-ons to VS 2005 like the ones for Team Foundation Server they are not automatically registered under the experimental hive. To make sure that experimental hive uses all the recent settings of VS 2005 we need to do a reset to this special instance. Reseting the experimental hive is done from the VS 2005 SDK.
Here is the command line:
”C:\Program Files\Visual Studio 2005 SDK\2007.02\VisualStudioIntegration\Tools\Bin\VsRegEx.exe” GetOrig 8.0 Exp