Add them to use members tab of one profile, then check Send friend request bellow the list. Go to Send friend requests tool and start it. Go back to Use members tab and scroll down to the bottom. Copy settings to all other accounts. Go to Account actions tool, check accept friends box and start that tool too. Copy settings to all others.
They will all become friends
God, it's so easy to get friends, I dunno why I don't have anyone to hang out with.