You have the setup, but since you need to create a cluster with out using the cluster software.
We did that in the test boxes, but you need to monitor it very carefully.
We uses the db2gcf and turn the db2 autostart off, then we wrote some scripts to start the instance on the other box, when ever we have a problem.
We started with no archive logging mode and then moved to archive logging.
regards
Mujeeb