Hi, Claire.
I also don't use Plover's built-in dictionaries. When I first started using Plover, I exported my Phoenix Theory dictionary as an .rtf file from digitalCAT's Dictionary Maintenance program and eventually imported that into Plover -- which, by the way, actually rhymes with "Lover" -- after creating a folder inside my DropBox folder called "Glenz_Plover_Dictionaries," which is where all of my various dictionaries are now.
I don't add anything to the Phoenix Theory dictionary (it's from 2014, and I don't want to overwrite anything in there with something new which might mess up something I didn't know I needed until too late).
Unfortunately, I (eventually) discovered there was a problem with RTF dictionaries, in that they would sometimes become corrupt, and add or delete some things from my dictionary definitions, like so:
What that is are couple of definitions I use for my website that are broken. Here's what those definitions are supposed to look like -- this time with the steno outlines:
In other words, the broken ones are missing part of their opening curly braces, so I had to create a .json dictionary just for those outlines -- as well as the commands you were asking about.
All that to say that I would not try putting your dictionaries into the "guts" of Plover. Just create a folder somewhere and put all of them in there, including your theory dictionary and any other dictionaries you have that you want to use. To that end, I have my dictionaries in a folder on DropBox so I can use the same dictionaries on different computers, if necessary. Plus, all of those dictionaries are pretty much automatically backed up, should disaster strike.
As for the Commands you were asking about, I have those in that same dictionary, which I cleverly named "Glenz_Fast" -- and you can see some of the ones you're looking for in this screenshot:
Finally, when you have a few, give this one a quick look-see:
That one is just a place-holder that will take you to the article that table is from.
Well. Sorry about the non-centered images (Google decided it needed to "fix" the groups a few months back, and did a crappy job of it) and the length! Hope that helps a bit. Good luck!
--gdw