Images of different size issue

Hi, first of all great module. But here is my problem. I have set up a block to rotate through various images. They have the same width but most of my images have different heights. This has caused me two problems. The first is that I get a lot of white space between the image and the next block below when one of the smaller images is displaying. Second is that the next image in rotation is smaller than the previous, part of the last image will show. I know that having all these image use the exact same dimensions could solve the problem, but not all of my images have the same orientation. Some are portrait and some are landscape.