Question : Enabling PXE on Dell Workstations

I've got a few (~15) Dell Machines here, ranging from Dimension 2400's, to GX70's etc.  Majority are  Broadcom 440x 10/100 Intregrated NICs, while a couple are Intel Gigabit onboard NICs.

How do I boot these into PXE?  I have pxegrub setup throughout the lab, and all the whiteboxes I have work perfectly using Intel Pro 100 Management PCI NICs, but these ones do not have any "Boot from PXE" option in Boot Sequence or anywhere in the BIOS.

I've googled for ages, and I've found nothing, except for the following document which says something about flashing it using those tools, but I'm unsure, and just wanted confirmation.

http://support.jp.dell.com/docs/network/063my/UG/pxe.htm

All the machines are brand new systems, so there running the stock BIOS on stock settings.

Thanks

Answer : Enabling PXE on Dell Workstations

In the GX100 and GX200 it is hidden in the network card settings in the BIO's.. I can not promise that it is there on these models...
I was unable to find the GX70 on Dells site and the 2400 didn't list it