Our crate didn't come with a divider so we took a piece of cardboard and cut it to fit really tightly and wedged it in the crate.
Sometimes even with barely enough room to lay down curled up in a ball, Johnny would pee in his crate and we'd find him sitting in the corner as far away from it as he could get.
We used the WizDog -
INDOOR DOG POTTY for: dog house training, housebreaking puppies, dog and puppy training which has a grate that goes over the pee-pee pads or even newspaper to hold it in place. Even then, he sometimes pulled out the pad or paper to shred.
As others have said, walking the dog makes a huge difference in behavior.
Cesar Milan says dogs need "exercise, discipline, and affection in that order."