easy duplicate of an insteon power link group?

I'm creating a bunch of similar scenes. Is there an easy way to duplicate one? If not that would be a great feature.

https://forums.indigodomo.com/viewtopic.php?f=81&t=23823 seems to be the answer...

in that thread where you talk about child / sub scenes, the idea would be to define common elements in one group/scene and specific differences in another, and then use an action group to execute multiple scenes in a row. Are there any delays needed to send back to back scenes (either via action group or direct linking)?

[matt (support)]

If you have the Always send group/scene cleanup messages checkbox DISABLED (via Interfaces->Insteon->Configure... menu item, then Interface Options... button) no delay should be okay. If that option is enabled, then individual commands to all the modules in the scene/group have to be sent after the initial scene commands, so it gets more complicated. A delay shouldn't really be needed as Indigo waits before sending out commands but things get more complex when you have all of those commands being sent. Point being, I recommend having that option disabled.