Boot image over http using only NETBOOT?

[teatree]

I need to achieve to boot ISO over http:\\ with NETBOOT from the BIOS. Without using any other boot device ie. USB,HD,CD.

So i cannot store the DHCP settings on any boot device.

Can this be done?

I have a standard wireless netgear router with DHCP but i understand not enough to pass to TFTP. I understand there is DD-WRT extended firmware for certain routers to be able to store PXE settings to pass to TFTP over the net but it doesn't support my router.

I was thinking if iPXE is in the Network ROM i can boot DHCP from there.

What are my possible options?

Regards.
Mark