The 2013 TOM.NET API has a getter for reading the rootStructureGroup, but how can one set the default value for the rootStructureGroup after creating a new Publication?
Have you tried something like this?
Publication currentPub = this.GetPublication(); StructureGroup rootSG = (StructureGroup)engine.GetObject(currentPub.RootStructureGroup.Id); rootSG.Title = "my new title"; rootSG.Save();
May need some slight tweaking to ensure the item is checked out / editable etc, but I don't see why this wouldn't work.
Quick Note: I'm using the TBB base project (http://sdltridionworld.com/community/extension_overview/templatingbase.aspx) in this example to get the publication object.