Product Listing Image Size and Columns Sizes

Hello,

I have a bit of an interesting problem:
I have the Columns Grid module installed but on the Product Listing Pages I want to have larger images than 130 pixels by 130 pixels without the images oversizing the the individual columns.

I have four columns in each row, and as stated if I try to make the images larger than 130 pixels from original images that are 500 pixels by 500 pixels each image goes out of whack from what it should be.

Is there any way to fix this so that I could have say 200 pixels by 200 pixels images in each listing by perhaps increasing the boundaries somewhat?

I apologize if any of this is confusing and thank you for your help.

Why don't you just have 3 columns instead of 4? It is much more pleasing to the eye. Even with 3 columns of 200pix wide pictures, it would seem that you also have to turn off either the left or right sideboxes too, so someone viewing on a screen set to 600x800 won't have your pages run off their screen.