SocialEngine Group - notify group members

bidder needs to have socialengine v3+ installed. By default, only group leaders are notified via the red popup, and group members get updated via the activity feed. i'm asking to have the group plugin v3.05+ modified so that members will get notified (red popup) when there's a reply to the group discussion or when a topic is created. NO SERVER/DATABASE INFORMATION WILL BE GIVEN. Please be generous as i have a small budget. thanks!