RTF is a global modification that replaces all towns in the game.

Let's do a favor for a favor: I'll send you a link, and you'll teach me how to edit the appearance of units, because neither Paint nor Photoshop can open the DDS files from Heroes 5. Maybe I'm doing something wrong.

Clever guy!:D Well, okay, everything's fair. 1) Extract the texture you need from the data. 2) In the properties, remove the "Read-only" restriction. 3) Open it with Paint.NET. 4) Edit and save. 5) Then you need to recreate all the folders. 6) Create a compressed ZIP folder. 7) Change the .zip extension to .pak. 8) Put it in the data folder.
Example:
Let's say I decided to edit the hero icons. I go to:
1) data.pak - UI - H5A2 - ICONS - HEROES - HERO_NAME.dds
2) I extract the HERO_NAME.dds file. 3) I edit it.
Then I create the folders UI, H5A2, ICONS, HEROES, and make the path as in point 1, except for data.pak. I create a compressed ZIP folder, put the UI folder in it, change the .zip to .pak, and give it a name, for example, MOD.pak.
I think I explained everything clearly.