How to update single ESX 4 host with virtual vCenter server?

Hi all,

I have a remote ESX 4 server (4.1.0 433742) which I need to update. This ESX box has a virtual vCenter server running on it which is then linked back to the main vCenter server.

My question is; is it possible to use vCenter Update Manager to update this host? I would assume not because it would be the virtual vCenter server running the update which would need to put the host into maintenance mode to complete which doesn't seem possible. So, if I am correct in thinking I cannot update this host with UM, what is the best way?

Thanks.

Pete.