[Fedora-xen] Xen Not Displayed in Boot Menu

Hi, I have installed "Xen" on Fedora16 host using "yum install xen" command and it has been installed properly. I can see the changes in /etc/grub2.cfg file too. But when I reboot then the entry for Xen is not listed in the boot menu. On further analyzing I found that in /etc/grub.conf there is no entry related to Xen. Do we need to modify grub.conf manually ? If yes then how to do that. ? Please help me with this. -- Regards, Sorabh