I've been going crazy all day trying to make the Pack work on a friend's server, not understanding why it was working on mine and not his. The movements are there but not the facial expressions. Turns out he have SkinRestorer installed on his server... Is there a chance to make it work in the future ? Thanks ^^

i think this is a problem with the plugin, they might not include the parts of the skin that aren't used. I don't know though, you'll have to check yourself.