The tutorial below is not obsolete, so I don't delete it, but you can find an updated version here: How To Convert Any Genesis Characters Into G8
We will start with G3 characters which are the easiest to convert. The basics are the same for Genesis 1 and 2, but with some additional steps.
I use here a female character but it'll work the same with males and I even think you might, with this technique, convert a male character into a female and invertely (I haven't tried though). I'll try to be as precise as possible to make it accessible even to beginners. Because of that it might look intimidating, but it's actually very simple and once you