Okay i'm guessing an update on the situation is needed:
Just so people know the skins have been tested in singleplayer and work, the issue at that moment was getting it to work in multiplayer which is now resolved.
Another issue though, has creeped up since this and i'm having alot of difficulty fixing it.
The code is there, the're is an issue with either the models themselves or the way I imported them into the SDK. Fixing this is painstaking I tell you.
This plus the fact that I have very little time (about an hour a week at the moment) to work on this is what is making the whole process very slow.