Ok don’t use the assimilation lab download, use the moddb two part download, that’s how I did this originally.
Just select ‘for current user only’ all it does is create a ‘Empire Total War.ink’ file, or something like that on your desktop, not an imahinary start menu. If you try clicking it it does nothing, so I just delete it. It’s really inconsequential.
This is what it looks like when I click on the exe. You can see I’m using the double download from moddb. I don’t know what this “bottle I created” is. Pretty sure it doesn’t matter though.
Let me know if you get the game working