Great, can't wait for the next update.
You do not have to wait for long... I will prepare the new parts for download the next days...
One thing I have been doing that might be worth making available is creating assemblies. For instance in Steck a doorway, door, the two hinge clips, and the latch. Saved as a unit together it saves a lot of time compared to having to put the parts all together each time. The same with window assemblies.
By using right click Explode you can break them down into sub-assemblies and then to individual parts, so you can open a window for instance.
Yes, Tim, that is a very good method. You might remember, that in all former versions there were such a folder named "Groupings" that contained exactly what you mentioned, but I have skiped it in this release. Why? you might ask... the answer is simple. In detail there are several reasons for that. First, there are so many possible combinations (e.g. different colors, lattices, etc.) that such a folder would be much too big for downloading. Second, the Grid-System now makes it is so much easier to handle that you can ensemble the subparts quick enough. And, third, as a consequence, it would be great if everyone esablish his own "grouping"-folder for his personal use just like you did, Tim. So I am really happy about your post, I have not mentioned that issue before but that was really exactly what I wanted to demonstrade soon. At the moment a more detailed "advanced-working"-manual is in charge, in that this method and other helpful hinds (e.g. exchanging or replacing parts in a whole model, diorama-buildups, huge files and how to handle them, ...) will be described.
But still there will be an "official" Grouping-folder again coming up soon, because we decided to rebuild all kinds of original Playmo-sets so that you can download and use them for editing or directly putting them in your scene, etc. In this context every finished set will come as a SketchUp-File and a Grouping-folder with their specifig groupings. You may keep these folders or copy all those folders in a single grouping-folder to establish your own "working-directory". This was my solution to handle the nearly infinite number of grouping possibilities