iMac network hardware

[Rob Diehl]

OK, apparently I need a module called 'gmac' installed in order for my 
network hardware to be detected. Is this available on the Ubuntu 
distribution CD? If not, how would I go about installing it?

Also, the installation told me how to get back into the installer at a 
later date, but I forgot what the command was, and the Ubuntu website 
doesn't seem to mention this anywhere. It would be VERY helpful if such 
basic info were mentioned in an easy to find location on the web site.