Hi, I have a problem, i have six identical computers and five of them allow me to use PXE boot just fine, but not the last one (mobo is P5KPL-AM IN/ROEM). All I had to do was go to BIOS and set the "LAN Option ROM" to Enabled, reboot and set it to boot from Network.
The only way I can see, how the last PC can be different is that it has two network cards (had some problems with the onboard nic a while ago... works fine now though). On that computer I can switch the Lan Option ROM to Enabled no problem, but the Boot order doesn't allow me to choose Network boot (that option doesn't exist).
It did however allow me to press Shift+F10 to access something called "Realtek PCI Express Fast Ethernet Boot Agent Configuration Menu" (now that's a mouthful). What I discovered there, was that the last computer had Boot order set to ROM Disabled....