Hey, I just bought a new 2008 Eos. Such a nice car

It came with a ipod adaptor that is in the center consul, it is very cool. But i have no clue how it works in terms of interacting with the ipod software. As in, b/c you select what song is playing though the auto system can you also some how select what playlist the song is from or do i have to clear off the ipod?
Thanks, P2