I disagree with the last poster. After my Sons perfectly good looking timing belt broke two days ago (I assume because of age) I'm all for preventive maintenance on this. We just finished the replacement of the belt this afternoon without to much of a problem.
I just Googled how to do it and I came up with a good link which included photos which helped . We did also have the Helms manual which walks you through the steps.
You will need a good high torque Impact Gun or you'll never get the Crankshaft bolt off. I would also suggest a 27mm wrench to rotate the cam and to hold it in place when putting the new belt on.
This is a good deal of work, but well worth the peace of mind.
Good Luck