Creating screen projector using spotlight?

[pxxpandaxxa]

I'm trying to make a projector that projects a computer screen, just like it would in real life, it needs to be square, not round. Ive tried messing with a spotlight with no success. I turned on lightshafts and got an interesting result, but it did not appear in game. I don't know a whole lot about lighting, so any help would be appreciated!
light shafts like this:
http://www.projectorrentals.info/images/projector/projector_250x251.jpg

also i need to be able to run in front of it and make a shadow :)

[ambershee]

Use a square mask in your light material.

[pxxpandaxxa]

thanks for speedy reply!

I know what a mask is, but what do you mean by light material?

[ambershee]

Documentation is a wonderful thing;

http://udn.epicgames.com/Three/LightingReference.html#Light%20Functions

[pxxpandaxxa]

Thanks!
Also with a bit more searching I found lightfunction, its lookin pretty good now :D