Maybe try our Hitachi Ops Center Administrator. From the volume create screen you can specify the resource group here, you can also manage the VSM's in Administrator (nothing = meta_resource):
To do this in raidcom you need to move the ldev into the resource group using the map/unmap commands.
I believe you can move a resource into a resource group in Storage Navigator under the Administrator tab.
To move resources to/from a resource group from an ldev perspective, I believe you might need to remove the lun paths before you do so.
Feel free to book a demo with our Centre of Excellence if you'd like to see a demo on Hitach Ops Center can help.