bind show_console '`' – insert this into input_a2.cfg (but first, you need to open it with Notepad). The file itself is located in the Heroes of Might and Magic V - Tribes of the East folder, in the profiles, default_profile subfolder.
// obsolete, but strictly needed for compatibility with some interfaces
bind close_window 'ESC'
bind confirm_action 'ENTER'
bind confirm_action 'NUM_ENTER'
bind show_console '`'
//===========================================================================
// Interface-specific sections
If so, save the file.
In autoexec_a2.cfg, which is located in the profiles folder, add the following to the end: setvar dev_console_password = schwinge-des-todes
The end should look like this:
//============================================================================
// Startup
exec profiles\map-aliases.cfg
exec profiles\start.cfg
setvar dev_console_password = schwinge-des-todes
If so, save the file.
And finally, add bind show_console '`' to the input_a2.cfg file, which is located in "C:/Documents and Settings/Owner/My Documents/My Games/Heroes of Might and Magic V — Tribes of the East/Profiles/Owner" (Owner is the account name).
In the file, this section should look like this:
// obsolete, but strictly needed for compatibility with some interfaces
bind close_window 'ESC'
bind confirm_action 'ENTER'
bind confirm_action 'NUM_ENTER'
bind show_console '`'
//===========================================================================
// Interface-specific sections
Save the file if it's correct, start the game, load a save, and check. If you followed my somewhat confusing instructions, pressing ` will open the console, where you need to enter the codes. But before that, to make the codes work in the console, you need to type enable_cheats. A message will appear saying that the codes now work, and then enter the code you need. You need to type enable_cheats on each mission, only once.
Added 1 minute ago
And also, let me know if it helped or not.