installing VirtualBox within openSUSE or Xen kernel

does anyone know how to uninstall Xen before I can be allowed to install VirtualBox? Or can I have both installed? If so do I install VirtualBox within the Xen or default openSUSE kernel?

after installing Xen, next time I rebooted back into openSUSE’s default kernel, I cannot get internet access? Or is it something to do with Xen’s internet access priviledges set?