replacing timing belt.

First, get a new belt. Talk to the parts man in the store. Then take off all the stuff holding the old belt, and put in the new one. Better pick up a maintenance manual, with pictures. Have you done much work on your car before? Do you have tools? I have never done it myself, so this is just a rough outline. I am sure someone else can help out. Also, there are other discussion groups ONLine that are more focused on engines. Check Yahoo.