Interim:I don't mean to sound dense, but I suppose I will as a side effect of my being new to the game, and thereby the livery, but... What's layer-shifting? I'm still trying to figure out how to make small things that aren't blurry and garbled/aliased myself, and this seems like as good a place as any to clear up the term 'layer-shift'. :3
Basically, layer shift is a result of a design being repeatedly sold on the auction house or gifted. For example;
1. I create design and gift it to Mr X
2. Mr X sells said design to Bob through the auction house
3. Bob then sells to Jim the same way.
4. Jim gifts design to his pal Mr Z
5. By the time Mr Z goes to put up the design for sale, all the re-selling and gifting has affected the games coding of the design, and individual layers of the design have noticably shifted in a certain direction, making the overall look of the design more sloppy and irregular.
Imagine it as an old person with alhtzeimers disease, the older it gets, the sloppier it gets, lol!

My gallery -
http://forums.forzamotorsport.net/forums/ShowThread.aspx?PostID=1840442#1840442