How to move from Active-Passive to Active-Active mode

Hi!
Is there any faster procedure as http://kb.open-e.com/How-to-move-fro...mode_1843.html
Without stopping failover?

like we can move complete pool ("move to remote node" and "move to local node",
can't we move to remote node just one iSCSI resource (one replication task)?

What about "Maintenance Mode", can I use "stop and enable VIPs" option and move to a-a?

All current sources/destinations are stay unchanged.

I've created new unused replication task, not used in cluster yet.
This task is planning to be active on secondary node.

That can work as well.