XNA Reference enabling

Dear all,

I wanted to start a small project, which involves my 'Xbox 360 Controller for Windows'.
To make use of this device, I have to add the "Microsoft XNA Framework reference".

I downloaded the "xna framework redistributable 4.0", and installed.
Afterwards, I should be able to add the reference of this redistributable, but I can't find it in the reference list of VS2010...

Does anyone know what I have might forgotten or overseen? I restarted Visual Studio, but it remains unfindable...

Any advice?

Thanks in advance!

Greetz!