Netbooting an xserve G5?

Hi all!

As the subject line implies, I am looking for a way to netboot an
XServe G5 using the ppc64 port. This server I got for close to nothing
is on an excellent state, though unfortunately, the CD drive is not
really working (it ejects every CD/DVD I have ever tried to feed it), and
there are conflicting accounts on whether or not these machines can boot
from an USB stick.

I was searching for something like 'ofwboot' (which I am used to since I
have successfully netbooted macppc machines to NetBSD and OpenBSD), but I
didn't find anything on the mirrors...or on the source tree for that matter.
I did find a 'loader' file, though I am not sure if that is the right file or if
it is relevant/appropriate to netboot from at all.

Has anyone had experience with these machines? or any experience trying to netboot
ppc(64) whatsoever?

Any helpful pointers greatly appreciated.

All the best,