Installation problem

I have a problem installing the toolkit: the 'extender' items will not install because it says

"Installation stopped because the directory for the ProjectType value did not exist. The project type is invalid for your installation of Visual Studio."

I've tried to install the WebApplicationProject thing, but it gives a message saying that Visual Studio 2005 Standard or above is required (I only have Express) and asks if I'd like more info. From there it either quits the installer or takes me to the VS website.

The VSI for control development should work with VC# Express or VS 2005. The former is free.