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

in principle, you can change the building layout like this

I haven't played much as the Dark Elves, so I don't quite understand which building allows you to recruit which units. So, is it like this: basic units - nothing, elite units - Fortress, champions - Stronghold?

Added 16 minutes later

yes, that's how it is, just delete the Maps folder from the map

Where is this folder? 0_o