Installing the editor without the game.

Is it possible to install only the map editor on a computer without installing the game? It's a silly question, but still.

Not silly at all, but quite practical! I have this standalone editor installed at work (although I haven't had time to use it in the last few months:().
Author of the editor - Black Phantom.
Thread on the WoG forum about the editor: http://wforum.heroes35.net/showthread.php?tid=1517&page=6
Its advantages:
1) does not require installation (although there is a version with installation);
2) has a built-in patch that expands its capabilities (creating a landscape from an image, filling with a specific type of soil, etc.);
3) can save both SoD and WoG versions of maps and convert from WoG to SoD;
4) allows you to change the properties of objects;
and others.
Only this version is newer (version 2.1 from 05.08.2011).