Link the video then, and I'll be honest with you, I've never had to do anything involving CheatModules. I never needed Ultra Mod Manager either, or had to merge them into one folder within _mods. All I ever had to do was extract and drop like it says in the readme into _mods. I don't know when any of this started, but I never had to do it even going back to 8.3 genuinely. Nor did I ever run into the problem of the mods not working beyond basic setup when I first discovered them, in fact it often ran too well when it would carry over into other saves I didn't want the mods to tamper with and I'd have to turn them off before reloading said save. I never had bug problems, transferring saves yes, but not problems with the mods itself. Feels like I'm installing sexlab mods for FNV/FO4
It's already linked on the mod post, which just shows that you clearly didn't read the mod post.
I find it hard to believe you haven't had any problems with the version you've been using previously because there have been a lot of changes to the game that broke the old Cheats Mod and its dependency (started back around 0.7.7.0-ish)
Also I don't know what readme you could be referring too as Cheats Mod has never had a readme. Mine only ever had the hotkeys listed.
The thing with UltraModManager (not to be confused with the Ultra Mod Manager app, completely different) is VERY recent, so of course you never needed it yet (UltraModManager the mod is still new)
At least 1 of the official uploads of the game for B.0.8.9.0 included the zip for UltraModManager v1.10 by the way, so there is the potential that we could see it replace the official Mod Loader.
The CheatModules are also still relatively new as they only really started to be released separately once others started making modules. The whole idea of the modules is so that players can skip installing the cheats that they don't want and only add the cheats that they do want.
The comparison with sexlab for FNV/FO4 (which is A.A.F btw) frankly doesn't match with LonaRPG modding at all, they are completely different beasts.
Everything you've asked for in regards to installing the mod is on the mod post, read it properly like you should have, it's all there, including Mod Management instruction screenshots for Nyx which clearly show a single entry for Cheats Mod (Modular Cheats Mod in the preview image that Nyx displays)
I'm done with this to and fro.