[CLICK TO SEE VIDEO]

FILES: DOWNLOAD TUTORIAL (22Mb SWF, play it with Adobe’s standalone Flash Player) and grab the example scenefile to try this yourself!

BREAKDOWN:
1. Set an OK center position with "Move Center to Bounding Box" / "Move Center to Vertices".
2. Enter "Center" mode. (top right)
3. Right-click on "Ref" button (below Local) and choose "Pick Polygon/Edge/Point Reference".
Click an object to select it and highlight the desired components.
4. While still in both "Center" and "Ref" modes, reset rotation to 0,0,0 then go back to "Object" mode (top right), go "Local" mode and reset rotation to 0,0,0 again. — That’s it!

FORUM THREADS: [xsibase] [xsiforum.com]