[libvirt] FW: Libvirt and openvz?

I just recently started using openvz and I'm trying to use libvirt/virsh with it. I followed the directions on page: http://libvirt.org/drvopenvz.html But I get an error trying to run define with the example config file: virsh define virt.conf error: Failed to define domain from virt.conf error: unknown OS type exe sudo virsh -c openvz:/// list error: could not connect to openvz:/// error: failed to connect to the hypervisor I'm using libvirt 0.7.2 with latest rhel5.4 openvz. Does anyone have more example configuration files or other setup instructions? Does Libvirt allow you to specify other resource limits and controls that openvz has - like vzctl set --devnodes device:rw or vzctl set kmemsize? Thanks, Tom