Arox would reply to you with unfunny picture or something, so here's a wikipedia definition for you: http://en.wikipedia.org/wiki/GIF
The Graphics Interchange Format (GIF; /ˈdʒɪf/ or /ˈɡɪf/) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability.
Sorry to disappoint you but that's not quite right.
I got a friend with S2 license and he uploads my skins whenever I need it. I also sometimes play LFS S2 at his house