Required files and settings for playing Heroes 4 in multiplayer.

Um... did you download the game or the disk image? If the former, you need to install the game, in other words, go through the installation process. If the latter, I don't know what to advise you, and discussing pirated software is prohibited on the forum.

Added 2 minutes later
By the way, why do you need 2.0? There's 3.0 (official) and 3.51 (and soon 3.6). 3.51 is the fan-made Equilibris add-on, which is universally recognized in the Heroes community and, in most cases, introduces quite useful adjustments to the game.