Augustin,
install the x86_64 version of CentOS 5.2. You will be able to boot the NetBSD/amd64-current domU install kernel.
-Pierre-Philipp
Quoting white list (11/08/2008 19:16),
Hello You All, I'm trying to install NetBSD on Xen. Anyone, I need a kernel to install NetBSD or FreeBSD or both to install it on Xen 3.2 running from CentOS 5.2