I know about @property and @synthesize already, but I have yet to decide to use them in Zeus. Thanks for the reminder, though.
And I thought you meant protocols, which I will probably use in Zeus.
And about the Song class tutorial, I didn't do anything except what was in the tutorial where all the code was given, so that's why I asked if you read the tutorial so that you would see that I'm not doing anything new besides adding paraphrased comments to the code. I'm holding off on another code example until I can wrap my head around some information and go through the tutorials linked on this page:
http://www.cocoadevcentral.com/
The above tutorials are great, but not as well composed-out, to borrow a musical term, as the O'Reilly Commons wiki book.
Either you are groping for answers, or you are asking God and listening to Jesus.