contrib for different images in category and product pages?

[Guest]

I've been looking, but I can't find a contrib that will do what I'm after.

 

What I want to do is:

 

display a small image in the category listing (in the "buy now" column)

and then a large pic in the product page. This will then do away with the need to "click to enlarge", so I need to kill that.

 

Is there a contrib that can do this for me, or that can be adapted without too much pain to do it?