Chass,
Berkeley should automatically go into a four-team playoff with the three teams that finished tied for 4th in Region 3 4A.
The winner gets the #4 seed in R3 4A.
The 2nd place finisher of that four-team playoff would then play the loser of a R4 4A playoff game between Lancaster and Rock Hill.
The winner of that match would then face the 5th place team from R5 4A to determine who gets the fourth seed in Region 7.
This breaks all 4th seed tie-breakers, but, of course, doesn't settle the problem if there is a tie for fifth in R5.
