ZanaCinida

I'm very new modding ME3 so i have been trying with not much success the swap, first time i replace the headmesh had no eyes, and the textures looked weird and transparent, i was kinda "inspired" when i found a mod from ELE, It changes the awful default headmesh from femshep for a better one. so i'm not sure if is it even possible the swap, that is why i would like anyone if knows any way or atleast tell me there is no way to do that, so i can move forward to do other things. thanks in advance!.