I am having trouble finding documentation on how-to migrate a cluster enabled GroupWise 8 system to OES2.

We have a 3-node NetWare 6.5sp7 cluster that we are upgrading to OES2sp2. I have found documentation on how to migrate a non-clustered post office from a NW server to an OES2 server but not on clustered enabled GroupWise POs or agents. I am sure there are a few things that one needs to be careful in upgrading a cluster with GroupWise.

Any advice would be appreciated.