Here's how I would do it:
Top 128. First round of the playoffs would be The Barclays, with the top 64 players advancing.
Round 2, the Deutsche Bank Championship. the top 32 players advance to round 3.
Round 3, the BMW Championship. The top 16 players advance to the final round, the Coca Cola Championship.
Round 4 would be Match Play tournament for $10M. Thursday's round would be the top 16. Friday's round, the Elite 8. Saturday's round, the Final 4. Sunday's round, the top 2 face off for the Championship, with the other 2 guys playing for 3rd place.