I'm a bit confused about the stuff with downloading skins.

Do I just have to get the .jpg file or do I also have to get a .dds file as well?

And do I just put this .jpg in the LFS/data/skins folder with "XRT_blabla.jpg" (for example)? And what is it with the dds anyway?

And is there a way to download skins ingame too?

PS: So I just save the .jpg which are provided by many people here in the skin forum in the skins folder?

PPS: I've already got skins but that is like 1 year ago so I can't remember anymore >.<

Put the JPG for the skin you want to use in your LFS/data/skins folder. Then use this guide to set up the skin in LFS.

Quote from eXoAndiBrot :

And is there a way to download skins ingame too?

LFS should automatically download skins people use that you don't already have. They will be stored on your machine so that they are only downloaded once. You can access these skins but many of them are private and/or team skins which you're not allowed to use without permission.