Mac and PC woes - AKICILJ

DDB has a server full of really good music, which I want to be able to play on my Mac. It is read-only, and I can get to it, just fine. If I click on a song, it plays through iTunes just fine. But I have absolutely no idea in the world how to build a play list or anything useful and clever like that. So, while I can play any individual song, I can't really set up a good listening environment. And I cannot for the life of me figure out how. Have had one hysterical crying fit so far, more on the way.

Anybody have any clues how to deal with networked music through iTunes, or a good mp3 player that works on Mac OSX? Winamp doesn't appear to have any real functionality, these days, for Mac, which is too bad, because it was a nice little thing, oh, ten years ago. It would be really really nice if I could find something that played ogg vorbis files, but I could live without the oggs if necessary.