Have you noticed this little gem?
If you use the Edit command from the Project Browser for a Detail or Model Group, like this:
… then you can use the Load as Group into Open Projects to update the group. Upon clicking the button, you will be presented with a dialog like this:
Once you click OK, you will be prompted to Update the group:
Pretty handy feature isn’t it?
What? Must test!
Do you know if the "Load as Group" command is available via API?
There was no response here:
programmatically load an RVT file as a Group? – Autodesk Discussion Groups
Thanks, I saw that thread earlier, so I guess "Load as Group" is not available via API then. Oh well. THX.
via email, from API pro Don Rudder:
"That is still not yet possible using the API.
Don Rudder LEED Green Assoc
Thanks for the follow up and confirmation.