I know, I can connected directly to the router. But I need to know how can I turn the mac into an acces point. There is an Airport Extreme. The Ibook connects to it wirelessly. I followed Airport Extreme netwok design guide without succes. I want to share the mac's connection through its ethernet port. I went to preferences and activated internet sharing. The xp shows "connected", but I can't do nothing. What must I do in the xp settings? Thank you. :-)