If the screws are exposed you do not have to remove the knob. Just need a #2 phillips screwdriver.
If there's a cover plate there will be a small rectanguler sopt on the side that you just use a small blade flat screw to push in on the little tab and it will pop off.
Anytime you can post a picture you will get more ansewers and less questions.
Last edited by joecaption; 08-19-2012 at 10:59 AM.