Change center banner images in Zen Cart

Ok, I have a very very small project here. I have a website based on Zen Cart and on my homepage I have 1 center banner and it rotates (called carousel I believe) with 4 images. If I click on the image it will direct me to the product page immediately. This is already set-up. The thing is that I need to change those center banners for new ones. I have already created these. So is it just a copy/paste issue? When someone clicks on one of the 4 banners, he has to be linked to the product page automatically. So basically like the way I have it right now. Don't see this as a big project, but as an easy setup for someone who knows where to change the old with the new images and make some new forwardings to product pages.