Marvell Yukon NIC PXE

Hi

Recently my school have bought 76 PC to replaces the old computer. The
Computer model is ACERPOWER SK50 with Marvell Yukon Integrated gigabit NIC.
Yukon 88E805X PCI Express Gigabit Ethernet Controller Family. We are using
Zenwork 7sp1 with HotPatch1 installed. We can't get the PXE to work.

IT always stop at 52% loading "boot/initrd". I have tried some yukon
driver sk98lin.o and sk98lin.ko and modified the initrd using my linux
workstation, and put it back to the pxe server boot directory. is still
not working.

Help.