I need this mod for 4.2 also! We just lost a bunch of money on an order on our old site because the guy didn't bother to read the return policy. Ended up in a chargeback battle and we lost because, according to the merchant company, there was no "click to agree"button. It was our word against his that we had informed him of the return policy before he sent his stuff back.
I would advice everyone to have the "click to agree" function!