To add to Matt, try
www.pdf995.com from Software 995, it is free and it works.
I use it all the time, for saving Tech Articles and such.
Rob
from Software995 "The free versions display a sponsor page in your web
browser each time you run the software. If you would prefer not to see
sponsor pages, you may upgrade by obtaining individual keys for each product
at any time for $9.95 each. "