Change header for different forums?

[jl255]

I would like to change my header depending on which forum a user is in. This is to create a more unique identity for each forum. i know that i can create a new skin for each forum and assign it, but i figure that will really increase the loads as it has to load a new skin for every forum. Rather i wld just like to change the header portion. Is there a way to do that?

Tks!