Different Banners for different sub-forums

[craiovaforum]

Is there a hack in order to do this?
For example, I have 3 sub-forums: IT, cars, motos, and I want in the first sub-forum a banner for an IT selling company, in the second for a car seller and in the third for a moto seller.
thanks

[bugzy]

that'd be a cool mod, id like something like that

[Our Sponsors]

[Ramses]

http://www.vbulletin.org/forum/showthread.php?t=94119
Try this one.