Custom Dialogue

Hi,

I would like to know if there is a way i can make a custom dialogue box that opens when you click on it from a shortcut in the skin and gives me the option of 2 addons to open then i can select one.
For example lets say you click radio it will then open a box in the center of the screen asking which addon you would like to open for radio.
Just wondering how I would go about this?

Thanks for any help, much appreciated.