I've added a Tournament Director autoPrize config file to this resource. The comments at the top indicate the prize reduction factor used and the payout % of (buy-ins + rebuys).
This config file can easily be modified for different prize reduction factors and payout ratios. It can be edited with any simple text editor.
You can find help on how to implement TD autoPrizes on the TD forums by searching for autoPrizes. This is a beautiful feature! I will never use prize templates again!
HiveKueen