Thanks guys. Went with jenny's suggestion - ordered it online from Sears - shipping $10 & installation $99. When it comes to plumbing or electrical, I'm clueless. Do appreciate the input - It's a new learning experience.
Amy, just unplug it, that is the extent of the electrical system. On mine, (and I assume it is true for all models) I had to detatch the electrical cord from the old system and do some minor electrical work attaching it to the new disposal. But it was fairly easy to do.