ive just bought an ibook g4 12" and im just configuring it atm. when you come to he option of connecting the internet i am confused, it has AirPort wirless built in, but is this all i need to connect to the internet (i already have a wirless network on my home comp) i have heard of a AirPort extreme wirless card, is this what i need? also, if i click 'my computer does not connect to the internet' could i select this option and sort it out at a later date when i have made the appropret purchases. thanks, please help. joe