PXE boot RHEL 6.3 or OL 6.3 from OpenBSD 5.4

[mufurcz]

Greetings,

It is possible to PXE boot other OSs (like RHEL 6.3 and/or OL 6.3) with 
pxeboot.  If so, can somebody point me to a valid PXE configuration.

Ioan