Wireless issue.

For the last two days I have been trying to establish a wireless conection from my iMac to a iBookG4 and have been having no luck at all. I have my iMac conected to a cable modem and simply want it to broadcast the internet so my iBook can pick it up.

When I create a newtwork on my iMac my iBook picks it up but can not conect to the internet. Any help?

Thanks for your time.
Cpt. Morgan

To set a network, wired or wireless, you need a router. Connect the cable modem to the router and your computers to the router. Popular routers, Apple's Airbort Extreme Base station, Linksys WRT54G

Sorry for being a newb. I guess its where we all start out. So I do need a router to broadcast a internet signal. No iffs, ands or buts?