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

how, for example, can I replace one creature with another? like, how can I make it so that mummies are used instead of undead?

Added 4 minutes ago
Added 2 minutes ago
[U]
I'm trying to insert the file, but it won't let me.

Added 3 minutes ago
data.pak\Characters\Creatures\Rampart\AlternativeUpgrades - maybe I'm extracting it from the wrong place?