544442 OScommerce FREE SHIPPING coupon code modification.

I need this modification DONE today right now within the next 4hours. So please only bid if you can only start this now and end it. I need a php expert of oscommerce. ONLY THE EXPERT should bid. I need an on and off button in the admin to enable and disable "free shipping" coupon working with other restrictive products. See, if I set free shipping coupon to work on products in certain category and put in the cart and enter the coupon it give free shipping to ALL (whether the other product is eligible for the coupon or not). Sometimes I want to disable this function, so if someone put product A + B + C in the cart and only A qualify for free shipping, it shouldn't give free shipping. Because other products are in the cart. That is problem 1. Another issue I want is, I want to add "Other" in country field when people register, so people can enter their own country name. This should be in register page as well as in address book edit page.