Yes, Steve, Marcella's lemon chicken works with a four-and-a-bit-pound (2-kilo) bird; the only difference is cooking time. I leave it on its breast for the first half hour, then turn it on its back and continue roasting for another half hourat 375F, then raise the temperature to 400F for the last half hour-ish. Base your cooking time on 25 minutes a pound, plus or minus a few depending on your oven.