... Rebellius threatened to upload his working build, which was over 300 MB in size.

So, he put together a complete version with Spanish and some other foreign language... He dug up a lot of interesting stuff in the archives - screenshots, Campaigns, and videos that you wouldn't normally see. He learned more about the differences between versions 3.0, 3.1, and 3.2. He created a clean English, SoD 3.2 version, with only one multiplayer map and all the MP3 files. All the Campaigns are launched from their own special menus, including Armageddon's Blade - and all of this is only 373 MB. In the archive, you'll find gems and troop count indicators - also in numerical form. It works with the HoMM3 HD mod.
Finally, I figured out how to use torrents and created my own. I posted it here, because registration is required on the site where I announced it. I don't know how well it will do. If needed, I'll upload it to a file server.
And here is THE HEROIC FOLDER, which contains interesting and useful files for the game.