Welcome to SillyDog701 Message Centre.
Firstly, you will need to have an AirPort card or AirPort Extreme card installed in your iBook.
mrmagic wrote:I am interested in buying an airport express - mainly for sending music, but was wondering if i can use my USB modem with it?
You won't be able to use AirPort Express BaseStation with USB modem (for internet connection). You must use ethernet modem if you wish to use your AirPort Express BaseStation for transmitting internet connection.
, you can still use AirPort Express BaseStation to transmit music from your iTunes (this technology is called AirTunes), and use AirPort Express BaseStation for wireless printing (USB printer). (Note: you will need internal AirPort card or AirPort Extreme card.)
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