You’re not wrong that you can install NNS canisters like this, but they are really annoying to set up properly. And I don’t know myself how you properly set up the real CMC to target different subnets and I also don’t know if it works properly on pocket ic. What I would suggest is that you use the fake CMC in this repository and use this to check if you make the right calls. (It’s not part of the releases right now, but I need it to be added there myself so I should get around to that this week)