I am internet sharing using an older iMac running Leopard. I have a Powerbook that of course works fine with the iMac. My niece just got an hp laptop for xmas and it wont connect with the iMac. I have already searched the net...i promise, but to no avail. This page was the most informational: http://www.macosxhints.com/article.php?story=20030803030354585 I can't find the keymaker, so I don't know how to make an appropriate hex key. So then I just took the password off of the network. PC still won't connect. On the pc, i clicked 'properties' for my iMac's network. Her OS (vista) demands a password, even though I removed the security. To me, this means I have to come up with an appropriate hex key. If anyone can help, I'd greatly appreciate it.