building customized debian kernels
Arg, ok, back with debian for my servers and new hardware.
With debian I got a more recent kernel for xen (someone forward ported xen to the current debian stable kernel), but an older xen hypervisor.
However I need an even newer igb network driver (where gentoo had backported them).
This line only builds the xen flavour:
fakeroot make -f debian/rules.gen binary-arch_amd64_xen
Location of the full howto.
Building only the kernel module:
apt-get install linux-headers-2.6.26-2-xen-amd64 /usr/src/igb-2.3.4/src && make && make install

