Changing a timing belt is an involved and complex job that requires significant engine disassembly and setting the proper timing. Changing the water pump almost always makes a lot of sense, since the significant labor cost is the same for both jobs and is much more than the parts. If you have never done a timing belt job before, I'd recommend getting some help.
matte is correct. When you subscribe to this website you get a step by step breakdown of how to remove and install your timing belt. It is the same info that shop owners pay $185 dollars a month for. Only you have access for your car only, for a whole year. I don't work for this company or make any money. It cost $26.95, I'd say money well spent. If you need anymore help e-mail me at firstname.lastname@example.org
matte I prefer Mitchell OD5 because of the feedback that techs can now submit to correct Mitchells mistakes. If you have an opportunity to use Mitchell take a look at the Ondemand live tips. Some users of Alldata say it is more user friendly but I prefer OD5. matte e-mail me so we both have a source of input when we come across a difficult vehicle.