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The Bukovskaya version is essentially 3.1. I either installed a patch for it or simply replaced the executable (like the 3.2 version used by phomm). The desired template is set in the ND-mod launcher. However, I don't have the HEROES3.ICD and mcp.dll files in my build (apparently, they aren't needed).
I also tried replacing the executable, but it caused problems with the visualization of some elements – menu items on the starting screen, etc. (for example, the amount of mana required for a spell is displayed as 1 instead of 10 in the spellbook), and some visual elements in the game (minor ones) are simply not displayed.
Overall, I'm not satisfied with simply replacing the executable.