New body types (burly, etc) / Created player editting

I'm fairly new to 2K on PC so I'm not familiar whether created players / player DNAs have a RDAT file that can be edited to adjust things like waist and hips. Also this year they added new body types for myplayer (burly, etc) but they can't be selected for standard created players. I was wondering if it might be a attribute somewhere that can be changed. If anyone has any insight, it would be appreciated.