Cluster mgmt of off-network (multihomed) addresses

I'm currently in the process of configuring an HA cluster to replace a single machine. The original machine had virtual interfaces plumbed for several different networks, which remote sites connect to for FTP and other data. I'd like to know how to do the same using the cluster (3.1 on Solaris 9 atm).
Part of the problem is when I attempt to define the Logical Hostname resource, I get the error "specified hostname(s) cannot be hosted by any adapter on xxx". I tried configuring a different (permanent) address on both cluster nodes that was on the same network, which allowed the initial configuration; however, when the resource was stopped, it partially unconfigured the permanent interface and brough the entire cluster to its knees.
Does anyone know how I can do this? In detail, I have interface ce3 with a network like 192.1.110, and virtual addresses that need to be failover resources in the cluster on 192.1.33, 192.1.34, etc.

I've managed to succeed in getting the multiple networks managed by the cluster, it appears. Essentially, I did an ifconfig addif to add the network, and explicitly set an appropriate netmask. I also put an entry in /etc/hosts, though I haven't done anything with IPMP. The cluster in question doesn't have multiple public interfaces (two private, one sunray, one public).
I suspect the netmask may have been the cause of my earlier troubles. Since we didn't have an entry for these networks in /etc/netmasks, it probably defaulted to 255.0.0.0, somehow making it such that when the cluster software unconfigured the managed address, it somehow partially unconfigured the permanent address and made things go pretty nuts.
I'm still interested in hearing what you've done to get it to work, however, in case I've missed something.

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