How to change the page image?

[eln01]

I am using template siteground-j15-150 (Green Day). I would like to customize is a little. In the top left is a image. I would like to either change the image to something more fitting for my use or have the image rotator mod control the images. As it stands, when I enable the AJAX Header Rotator mod, it places the image on the right where the newsflash is.
How can I make the AJAX Header Rotator set the header image on Green Day template?
Thanks,
ELN01