Stars' standard payout for MTT tournaments pays 4 at 28 players. To get a special arrangement for these games to pay 4 at 15 players, (5 at some higher number also prob), we would have to contact
support@pokerstars.com and make a request. I kind of doubt that it will happen, but you never know. They do give KotZ a break on the vig, so anything is possible if you ask, I guess.
Doc