Required files and settings for playing Heroes 4 in multiplayer.

Hello everyone!
I have the same problem as described at the beginning of the thread. That is, I need to install patch 1.3, 2.0, etc. But they won't install. The error message says: "Requires the Russian version of Heroes M&M4 from BUKA to be installed!" But I already have the BUKA version installed!

Here's the info from the readme file:

The 3DO Company
BUKA Company
Heroes of Might and Magic® IV, Russian version
May 2002
Version 1.1

I don't know what the reason is...