Image Size too large

All,

I have posted some of my images using the NextGen Gallery Plugin, but in Image Gallery Mode (which I would like to use so people can add comments), it seems the images are way to large for the page. I have even made the original images as small as 320X240 but on that page it seems like they stay a lot larger. Any suggestions to have the image browser display the actual image size? The current images are all around 640×480.

http://www.jcoreydavis.com/New_Artwork/?page_id=111