Please Read (question) modding

Ok so people have mad L9 mods to make an Arctic Wolf, How come they don't replace the skin to make an exact replica of the NX weapon?
And also, instead of Photoshop CS4 to edit, I use Fireworks CS4 to edit and everytime I try to edit it says "could not read file"
please help.

Fireworks can't read file, you need plugins

its hard to make it look EXACT

also, did you convert it from nexon to lithtech? if not i suggest you go here:
http://www.mpgh.net/forum/210-combat...-tutorial.html