If you are a member of a Gold Family Pack, (other than the primary) do not promote any of the members to adult. They will be removed from the Family Pack, and their Xbox Live memberships will be changed back to Silver. The only way to get them back in to the Family, is add them in all over again - but it takes 5 days for the change to take effect. Five days to wait to restore their Family Pack membership. Presently there is no way for Family Pack members (other than the primary) to download "M" rated demo games. So the previous posts on this subject were not correct.