deleting or changing header images on some pages

I set my header image to display a 1280 x 400 pixel slideshow on the home page, but would like to either delete the image container, or change the container size from 400 high to 150 pixels high on posts and pages below the top level.

Is there a way to do this? (I am fairly new to the Atahualpa theme & Wordpress)

I tried suggestions from older posts, but these result in displaying the suggested code in the header instead of enacting the code. I pasted the code into the Configure Header Area.