Setting up sharing for groups is easy, just follow these three steps:

1. Make sure your friends are on your friends list - this is how KeepandShare knows they are in the universe your account will be sharing with. Click on "Visit" in the gray tabs. If your friends are not already on the list, click on "Add New Friend" and type in your friend's user name, or use the Invite a Friend command to create accounts for your friends.
2. Once all of your friends are on your friends list, set up a share group.
3. You can now set sharing for items and folders by choosing the group "Share With" pull down and choosing one of the share groups you've defined. It's particularly powerful to set sharing for an entire folder - then everything in the folder is shared at once.