Hello, the mod installer DOES in fact work, certain versions of the game out there unfortunately have issues with their mod installers not working, though far as I know most of those have found workarounds for the issue. It is related to the registries in those digital versions.
The mod installer is required to install this modification, if the modification installed properly through the modinstaller and is in your modifications listed within the game (Along with in the game's mod directory). Try waiting for a few minutes when you load the mod, some mods take longer than others to load, especially depending on the machines they are installed on, some people's computers do it in under 1 minute, others can take as high as 7-10 minutes to load the mods... Idk why it doesnt at least tell you it's loading the mods but it doesnt.
If the mod is in the game directory:mods:mod file folder name:
Verify there are items within that folder, we know for a fact the mod does work fine, as its been around for quite some time, it could very well be issues with your particular version of the digital download causing issues for you. Where did you get your version of the game from?