Referrer based cloaking

Need an example of how it works

[grnidone]

Can someone explain how Referrer based cloaking works and give an example of how it works?

Do all scripts do it?

I have a game which is linking directly to my images, and it is a bandwidth hog like you won't believe.

Thanks,
-G

[toolman]

[webmasterworld.com...]

[grnidone]

Righteous! Thanks!
-G