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

HoMM5 Chaos Theory
http://www.moddb.com/mods/homm-5-chaos-theory/downloads/chaostheory038demo#downloadsform

Well, at least they released something (this mod has been in development for several years).
A month ago, there was no link yet.

Added 33 minutes ago
I haven't seen everything yet, but I must say that from what I've seen so far, it's not bad!!!

Added 21 minutes ago


Added 22 minutes ago
The lineup has been completely reworked only for Humans; for Necromancer, only the "second column" (standard upgrade) has been reworked, and unlike Heaven, where most of the units are taken from Heroes 6, Necropolis has units taken not from the world of Might and Magic, and it's not as well done as with Heaven, but it's not bad!!!