I am admittedly dense about this, but I feel helpless and stupid. Susan, it sounds like you've got a problem. You have all of the correct parts, now you just need to put them all together. First off, you need to know what each program does. You can't find music with QuickTime and you can't play music with Macster.
Lets take it one step at a time.
The program to use is called Macster. Readers may have heard about the recent lawsuit with Napster , a PC program that allows people to download MP3s off of the internet. The guy that thought this idea up should be rich and famous by now, but we all know that life doesn't work that way. So, when people with Napster go online, you can download any of their MP3s. As you can imagine, the record companies don't like this very much.