how tthey create mod that create a same face

[maload]

i only know that a player must have the same resource as a modder have .

 

but next what i need to do if i want to create a mod too.

 

this is my example

 

http://skyrim.nexusmods.com/mods/17570

 

i download this mod and i download every mod that he ask for .

 

so finally i have the npc that look like in his screenshot.

 

 

so you can guide me a little bit how to do it.

 

thank you so much