6 CD Changer and Infinity Speakers

I just ordered a 2005 Liberty Renegade with the 6 CD changer and Infinity speakers. I guess I'm confused by reading some of the threads when I hear that the CD changer does not have any controls. Does this mean that I will not be able to jump from disc to disc? Also, as far as the Infinity speakers are concerned, are they just better sounding or do they come with a subwoofer? Actually, I would also like opinions on how the stereo sounds with the Infinity setup.

Thanks for any feedback.

Mike