Ron Paul is a liberal's conservative.
Ron Paul is a Libertarian. He's a Republican Congressman, but most of his political philosophy is Libertarian (Libertarian's believe you should be able to do whatever you want as long as it doesn't affect anybody else or their property...and they believe that the government should be as limited as possible).
Anyway, a NeoCon is simply a one-time Liberal who switched over and became a Conservative. The picture of Bill Kristol is funny, because his father, Irving, started the NeoCon movement.
NeoCon's come to mean a Conservative who has a strong interest in spreading American style Democracy and capitalism to other nations, but that's completely inaccurate. Bush and Cheney are not NeoCons...both were always "Conservative." Dennis Miller is a NeoCon...he was a Liberal who moved Right after 9-11.