@Riot: regarding custom skins

I was just wondering if someone could help me out with making some custom skins, I don't want to do JUST a recolor, I want to do a quality custom skin (namely, I want to put Fizz in a Tux... if reasons are needed, read my name again >.> ).

I'd absolutely LOVE if Riot came out with a Fizz(inatux) skin, but given the Void skin that just came out recently, that's likely a long way off. So I was hoping I could get some help with making custom skins so I could manage this for myself (until Riot comes out with it <3 ).

Thanks in advance, I only ask here because any tutorial I've found so far is 99% for recoloring (the 1% that wasn't was a video on SR skins... which was just how to recolour that anyway soooooo... >.> ).