Level Changer
From Populous Wiki
This was an early program created by TedTycoon which replaced a Multiplayer level with a Single Player level so that players could play Multiplayer on the original Single Player levels.
This was created before the Poplous Re. Matchmaker which meant mappacks were not around.
The program was abbandoned when mappacks were created which was a much better solution of playing different levels on Multiplayer. TedTycoon then created SP Worlds, a mappack containing Single Player levels with all the huts deleted.