I need to monitor our file-print cluster with OpManager, mainly for disk usage, CPU, memory etc. Is there an "easy" way to do this?

At the moment I've set up the each node of the cluster as an individual server, and set each one up to monitor the resources that are currently hosted by that node. But every time a shared resource moves to a different node, I have to go in and manually change all the alerts to point at the right nodes. As well as being tedious and time consuming, it also means that historic data for a particular share might be spread over each of our 4 nodes - I can't get a consistent view of the trends for the shares regardless of which node it is on.

Is there a work around to get this functioning now, or is there anything lined for future releases that will aid this problem?