change owner of clusterware during an upgrade of oracle 10.2.0.3 clusterware to 11.2.0.3 grid infras

Hi,

We are about to upgrade our RAC installation from 10.2.0.3 to 11.2.0.3. The clusterware in 10.2.0.3 is installed as user oracle, but when we upgrade to 11.2.0.3 we want to run the grid infrastructure as user grid, not oracle. How do we do that? If we try to upgrade as user grid, it fails because the grid user is not the owner of the old cluster.

One way is to deinstall the old cluster on half of the nodes and reinstall them with grid infrastructrure (GI), stop the database on the old cluster, register and start it on the new cluster on GI and then deinstall/install the rest of the nodes in the old cluster. Is this the only way to do it?