teedog on "How to not create a cached and resized image"

This is my first day digging around zenphoto, so pardon me if I ask something silly.

It appears that zenphoto creates 2 cached copies of each original image in my alburm: 1 thumbnail-sized copy and 1 copy sized according to the "image size" setting in admin options. Is it possible to have zenphoto not create the larger of the two cached copies? I like the thumbnail, but when I click on the thumbnail, I want to see the original image, not an intermediate resized version of the original.

Thanks in advance.