Change thumbnail size and multiple category images?

Hello, My apologies if this question has already been asked. How can I change the default size of the thumbnails in the product listings page? Also I have two images I want to appear on every page of a certain category, I figured out how to upload an image for that category but the image gets shrunk down too small and I can only upload one.

Image size settings are in admin > configuration > images.

I don't quite follow what you mean by your second part - I guess you're talking about the category image (again, the size of which is controlled in admin, but applies to all categories).

Not withstanding the size issue, you could always create one image out of the two with your image editing software.

An answer for displaying it/them really depends on exactly what you mean by each page of the category - do you mean the listing or the product info pages or both? And whereabouts on the page you want to show it.

You will then probably need to add some code to the appropriate tpl file with the logic of "if it is the right category display these images". Categories are identified by the cPath value.