Project created in Visual Studio, open in Visual Studio Express for Windows Phone

I am new to Windows Phone 7 and Visual Studio and was just trying to look at a sample project and apparently the project was created in Visual Studio 2010 (as the .sln file of the project says)

On my machine, for WP7 development I have installed Visual Studio 2010 Express for Windows Phone which comes with WP7 SDK.

Now, when I try to open the sample project on VS Express it says:

The project type is not supported by this installation.
 

Is there a way that I can try the sample project on Visual Studio Express for WP7 or I must have Visual Studio installed?

Edit:

This is the project that I wanted to open in VSE for WP

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