i know but the skins aren't uploaded on lfs world and many of the skins from the Finnished Skins link don't appear online:P i have my own skin but i can't upload it cause i am demo user:P
I am not aware of a library that shows all skins (or preview) that are uploaded. Only a user can see the ones he uploaded himself. It would be nice for the demo users to see which can be seen by other when being online, but then again, it's just a demonstration of the game and not supposed to be a standalone game. For what you get, LFS is as cheap as it can get. You barely will get an equal quality software for that price. Buy a license. ^^
You best bet would probably be to choose a skin and ask the uploader if he uploaded it or what the name of it is.
I for one, uploaded this one within the demo conent: Name is: XFG_block2010 So, you can basically use it right away
Someone seems to have uploaded this one. Name it: XFG_tnr.jpg and see if it can be seen by others
While looking for my post i stumbled upon a paint by Liner32