Excellent point Tailhook and well said.
For our repaint enthusiast I might suggest that you take a look at airliners.net where I am sure you can find most likely a hundred Southwest plane photo's
If you are not prepared to "mess around with stuff" like altering Cfg files to make Textures you download fit, then you are going to be in for a very hard time trying to learn to paint. And once you have painted, you still have to configure folders and files to make the paint work - even default planes.
My suggestion to you is this - have a look at a few Tutorials on re-painting and if you have any serious problems understanding them - then forget about painting, just ask someone else to do them for you.
Finally, you only talk about FS2004 default aircraft 😞 You are missing out on so many great planes and so few people will paint the defaults as they are such poor quality. Consider lashing out and downloading a POSKY plane or any other good model, although I would stay clear of PMDG as they are complex to fly.