Users have become accustom to the other guides around here that "hand-hold". This has been discussed on several occasions for STEP and it's simply not something that we're going to be doing with the Guide. Guides like Fear & Loathing and Skyrim Revisited, do this and is where most of the hand-holding comes into play. STEP assumes that users at least know how to use their mod manager and can install a mod without having to be told every single click they should be making throughout the process. So no, STEP is never going to tell users to:
- Download mod x's main file and optional file
- Double-click the downloaded main file for mod x in the download tab
- Click install.
- Now double-click the downloaded optional file for mod x in the download tab
- Click merge
That is...to be blunt...ridiculous from a maintenance standpoint and is what I, personally, call "modding for dummies". This is the very basics of using a mod manager and STEP assumes users at least have an understanding of these basics. If users don't, then they need to read the Guide for their mod manager. However, support is always offered in the Support Threads. So yes, STEP assumes users know these basics. Where the instructions deviate from the basics, STEP provides detailed instructions. All the user has to do is click the link in the Guide to the right of the mod to view these instructions.
With that said and from Ray's example above, this doesn't seem to be the case of what is causing this issue with it being difficult for some users. In the example, I can see where it might be confusing to a user that has never modded the game and, thus, wouldn't know what MCM is. These types of things CAN be fixed with a bit more explanation. So...good example and feedback you gave there!
To answer your question, MCM is the Mod Configuration Menu which is found only in-game when you hit Esc to bring up the menu. You'll see "Mod Configuration Menu" as one of the options (but not until you install the Interface section of STEP since one of the mods there adds this menu item). Basically, when you open the MCM in-game, you'll see a list of mods that are configurable. We are telling you in the instruction for Trade and Barter to NOT click the feature in this menu which activates or "starts" the mod. This is because we only want the base features of the mod to be present and not the entire feature-set of the mod.