I want to know it, too. There is a file named boot.local in the directory /etc/init.d/, which is simillar with rc.local, but this file is processed before probing some PCI devices, not at last. So I can't use it to configure some parameter of my NIC.
I checked it and found most of setups can be done with the module sysconfig. thank Sworder! But I still want to know the answer. Or does this file exist?