I just converted BBMYLOVES Lebron without beard from 2k12 to 2k13 using the chinese mod tool on Modding Way. You just have to use "like" headshapes. Very simple.
This is HUGE.
http://wtferrell.ms11.net/lebron13trial.iff
Download, check it out. His png is 1013, just like last year.
Awesome, awesome stuff.