How do I crop a series of photos to be the same size in photoshop CS2?

I have about 200 images that need to be cropped differently, some are fine the way they are but most need to be cropped. These photos are for a website & they need to have a uniform look to them. When I originally went through to crop them, I ended up with different sizes which looked unprofessional. Also, tried cropping & resizing to the same dimensions but still didnt work.