So yes you can annex a puppet?
As for pics, I can do those after work. I did a collaboration government and got nadda out of it. Actually lost Industry and got nothing out of it for 2 weeks, so I just went back to an old save file and ignored a broken mechanic. But I have the save file, so I'll offer it up a bit later today.
Also, these governments are often Free Trade from what I'm seeing, so it feels like I'm not going to get as many resources by Collaboration Government with them, since they give away 80% of the goods they produce which seems like a bad mechanic for the overlord.
What's the point of Collaboration Government as Germany if the Collaborating Government is allowed to get rid of 80% of the goods you want them to give to you?
Or are the goods available for export increased, so you get more goods as the overlord?