you can create playlists... or a favorite playlist.
To create a playlist - go to playlists then create new playlist. From here you select the songs you want in it then you name and save the playlist. Similar to winamp functionality.
Favorite playlists can be access through the main interface bar in the mp3-player (click the menu up button - then click the favorite button on right hand side ... this will add the song to your favorites playlist).
Since we're on the subject, maybe I can make a suggestion: When you hit the favorite button, a list would come up (near the button, like the Start button in Windowz) with a number of playlists to add to. You then would select which playlist to add the song to. It would be a little eaiser then having to go through the (sometimes) tedius process of editing a playlist.