Nowe ulepszenia (Polish) (for older VCMI versions)
But they need to be corrected manually, Kuririn didn’t make bugless version (as I remember).
If you know polish, you can discuss mod on
There you can find images of new additions and ask creator, where will he publish his current mod progress.
There also somewhere was his mod, that added alternative units to Cove (but it is also for older versions).