What's New center section and spacing

My address: https://www.mardiawebworks.com/store
The What's New center section, how can I change horizontal spacing between and outside of images and add some space before and below the images? Everything else is just how I want it....thanks to reading the forum information and previous question replies. : )

You could add this to your stylesheet:

.centerBoxContentsNew {margin: 1em 0 1em 0;}

I'm not sure what you want to do horizontally.

Maybe this will help (inserting pic)...I want to reduce the extra spacing in the middle of the four images shown and the outside of the four images. I want to add just a bit of space above the image (between the header and price).
[Attachment no longer available] I thank you very kindly for your time and help!

stevesh,
I added your code and that took care of the space between the image and header and between the image and price at bottom. Thank you! I'm adding this pic....for the other spacing question: