Ok.. None one can help with me.. Maybe I am not clear what I am talk about..
School Network using DHCP ethernet connect to Airport base station come with default DHCP such as 192.xxx.xxx.xxx. I couldn't use school's dhcp on airport. Anyway, three computers can see Airport Base Station it showed me green that mean its connected. However I couldnt make it work with internet. I am kinda of stuck right now.
Airport Base Station is very new like one week old also three iMac G5 too.. Anyone can help with me?