Points are calculated on the fly in standings.php based on the wins, losses, ties, forfeits etc.
This makes it quite difficult to do different point calculations based on the elements of the individual games. You'd have to add new stats columns, attributed to the team, from which points can be derived. As an example, if you want to add points to the forfeit winner, they're normally calculated under the "wins" column. If you need to distinguish a forfeit win from a normal win, you'd have to add a new column to the sportsdb_teams table, and modify all of the add and edit score admin screens. Depending on the sophistication of your rules, this would be quite a bit of work and might necessitate some more heavy-duty re-engineering of the points calculation logic.