Hi there,
a couple of Southwest Airlines liveries uploaded at Avsim.
N20SW -200 in the original livery
N22SW -200 in the final (Southwest only) livery
N23SW -200C the only combi
N68SW -200 ADV "The Winning Spirit"
for those who like the historical part check this site:
http://www.blogsouthwest.com/blog/flashback-fridays-making-iconic-southwest-image

http://imageshack.us/a/img855/4733/southwest1csforumn20sw.jpg

http://imageshack.us/a/img41/2725/southwest1csforumn22sw.jpg

http://imageshack.us/a/img51/90/southwest1csforumn23sw.jpg

http://imageshack.us/a/img594/4091/southwest1csforumn68sw.jpg

Good flight,
Lex