Stained Glass Windows Effect

Hello,

Can someone please help me with getting a stained glass window texture to project on the floor in a room please? I am trying to create and atmospheric room with some light shining through one of the stained glass windows, but everything I do just does not work, placing a light source (e.g. pointlight, spotlight) behind the window does not results in light coming into the room let alone projecting the stained glass window image.

I've been trying everything but had no luck, I've also had a look @ one of the answers given to a user on here but that did not help me much either. I'm a newbie with Unity 3 and I'm really enjoying it! Thanks ever so much in advance to those taking their time to read my post and to anyone who can help me!!