Re extra folder: The readme does mention the step of creating a folder. If I add the folder to the archive, then the readme isn't immediately available, as it is moved as well. I'm torn about this and opted for the current variant.
Which case is more likely?
* People "know" how mods work, ignore readme, and complain they have to create a folder
* People don't know how mods work, would want a readme front and center
* People don't know how mods work, ignore readme, and... know how to complain?
* ...
I guess a combined variant is the compromise: put readme and the mod-folder into root of archive.
The readme also specifies the package being version 3.0, as it's a new packaging, and specific for the source port. Also to separate it from the previous two versions.
(Plus: Did you choose .7z to keep up the mixture of compression formats like in the first post?
7zip is not universally installed, .zip is supported natively in MS Windows)
I'm also considering to name it "HighRes_Object_Textures_..." as (possibly) someone wants to make a mod for actual high-poly-count objects - which is also why it's registering itself that way in the game.
Will update all of that later today - tomorrow morning latest.