product listing image same size for all?

Hi,
Another question....
Doe's anyone know if I can make each image the same size on the product listing? I currently have all different sizes showing up depending on the image.
I don't want to distort each image to do this, so if there any way I can create say a white background for each image so if the picture dosn't form a square then a background of white is used so all images appear the same size?
Also is there any way I can sort it so each image has say a thin black border around them?
Thanks again for your help :)

Simple way is to create a matt of a standard size and place your image in it and save as the same file name. Using PhotoShop one can make this an action to semi-automate this.
once all images are the same size a border can be added in the stylesheet like this;

.listingProductImage {
border: solid 1px #000000;
}

That's great! The border works, I'll sort the images out and everything should be fine, thank you for your reply!