NetInstall with Grub, Kernel does not recognize NIC

Hi, AutoYast (suse8.2) over the network with a RealTek NIC works relative well. Now we want to to the same with a "Intel 82801BD PRO/100 VE Network Adapter". It's an onboard Adapter. We successfully patched the grub sources (pci.h and config.c) for the right PCI-ID (0x103a) and modified grub.spec (--enable--eepro100) to define only this NIC. The grubs tftp load works perfect, but afterwards the kernel is not able to establish the nfs Connection which works well with the RealTeK NIC. But it is possible to choose the right driver interactivly in the ncurses environment (here the EEPRO100). The rest of the Installation runs then as it should. Question: How can I help the kernel to find the EEPRO100 module? Regards, Kurt