I have a question about the license model of SLES 10 and OES2 cluster.

We have a 2 node OES1 / SLES9 Cluster running Groupwise.
Now we want to expand the cluster either with 2 more nodes
with OES2 / SLES10

or with a new 2 Node - Cluster with OES2 7 SLES10.
how do we have to license this ?

btw. OES1 is with 400 Users licensed.

Ist option 1 working and how do we have to license this.

Thanks in advance for reply.