"The meaning of life is to better yourself and the Universe."-Satan
Spiritual Satanism is about completing the Magnum Opus (information on this can be found on that site you mentioned.) It is about advancing the soul through power meditations. If you have questions, you could check out josministries.prophpbb.com to get answers.
I would suggest reading the Satanic Bible by Anton LaVey. He explains what Satanism really is and breaks down everything from what would be the commandments (if you will)to the way how a ritual should be performed. As for the site itself, it has some useful information, but most of it is either made up and/or extremely vague.
Sorry, Chris, werewolves are not real and therefore nothing can turn you into one. The idea of the werewolf comes from a medieval misunderstanding of certain medical conditions such as rabies.The idea that one can shift into the shape of a wolf and back comes from fantasy novels and Hollywood films.
Certainly Satanism has nothing to do with werewolves. You friend was either misinformed or he wasn't telling you the truth. As has been suggested, you might want to read up on what Satanism is truly about so you will be better informed next time.