Dan,
It sure is possible for the novice to change the plugs on the PT. The wires are a weak point in the ignition system also, so you would want to change them while the upper manifold is off. Use Dielectric grease on the plugs wires and anti-seize on the plugs. For a 2001 the hardest part is getting the EGR pipe off the back of the manifold. There's two different size (10mm & 13mm I think) bolts that have to come off before you can move the upper manifold out of the way. See if you can get into this Imagestation link and it will give you step by step directions.
http://www.imagestation.com/album/?id=4291473219
OH yea,
WELCOME to the forum.
