[Wlug] Specify which nic gets named eth0

I have a RHAS4 2.6 kernel install with 6 NIC's. How do i tell it which nic I want to be labeled eth0? specifically, i have 2 nics built into the mobo, and 2 dual port addon cards. I want eth0 to be nic1 on the mobo, and eth1 to be nic2 on the mobo. By default it is assigning those nics to eth4 and eth5. thanks in advance... mike