xen discuss - Jun 2009 - how do I see the grub menu?

I''m installing Centos as follows:

virt-install --paravirt --name centos --ram 2048 --os-type=linux
--os-variant=rhel5 --network bridge --file /rpool/vms/centosx --file-size=20
--location http://.../MYDVD/

This gives me a command line install, which is actually what I''d
prefer. However when I finish, the system boots without showing the grub menu.
This is a potential problem. In both error recovery situations and also when
going upgrades, I may need to force a single user boot or choose a specific boot
option.

Any suggestions?
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This message posted from opensolaris.org

OK, answered my own question:

1) remove "hiddenmenu" from menu.lst
2) raise the timeout from 5 sec to 30 sec, so I have time to connect to the
console after issuing a reboot or start command
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