1 life to lose capture the flag

Hello, in Halo 2 my friends and I played a great gametype where you played 1 flag ctf but only had one life. If the defenders killed all the attackers the round would end, teams switch. If the attackers killed all the defenders they would receive a point because there is no one defending the flag anymore.

Despite the fact that 1 flag is a difficult gametype to get working since custom games are severely limited does any one know how to do the correct scoring mechanic? currently if everyone on a team dies the round ends and awards no points no matter what team is alive