(What Kris said was exactly right.)
Please do keep asking questions like these, Charlotte! If something isn't clear for one person, then it's mostly likely unclear for many. If one person has the question, you can bet others have it, too. I've had a number of people say that they're not familiar with Google groups and so will need some help and hand-holding. Getting questions exactly like these out there so they can get answered means we can put them all together to help anyone new.
I'm so used to groups and lists and all things geeky that I can forget all of the things that really are *not* clear or obvious.
Thanks!
- ashley