OK, as I mentioned on the HiveWire forum, Structure's Node Tidier for the Poser Material Room works in all versions. I have it installed in both Poser9 and PoserPro 11, and I've been using this for about a month now, and I really, really like it.
Below are some screenshots, the first being what a matzone's nodes might look like when you first open it. In this case, it's from one of Satira's products, and since she DOES edit her mc6 files to neaten up the nodes, this isn't how it looked, but I adjusted it so you could get the idea. Also, as I've already mentioned, this won't necessarily be perfect for procedural materials with over a dozen nodes, but it helps with materials without too many material nodes, but which are just scattered around. The beauty of this script is, it adjusts ALL matzones at once, so it will save you a lot of time if there are a dozen or more matzones. You won't have to do each one separately.
Here's a screenshot of how it looks after you use the Collapse Previews option. I start with this one, as it often cleans up enough, so I don't have to use all the options to get it neat.
Next is a screenshot of how it looks after you add the Left Edges option.
OK, here's a screenshot showing how it looks after you've applied all the options. I have not tried using it with all the options checked from the get-go, but it should work just fine.