scheduling issue

[shootout]

10 teams, 2 divisions, play division foes twice and other division once. 3 weeks of playoffs.
With the advent of the extra NFL game we now have a regular season of 14 games instead of 13. We want to add WEEK 1where top 5 scores get a WIN and bottom 5 get a loss. I know we have to play against league average but can't seem to get the schedule reset that way. It automatically regenerates the schedule to 5 games for each of the 14 weeks.
Advice?