I'm new to modding, so I wanted to start with editing an existing mod, namely Bot Warfare.

I decompiled the .iwd folder, edited the welcome message (just to be sure not to break anything), recompiled the folder as .zip and renamed it as an .iwd. When I reloaded the mod and started a game, the mod did not start, given that I did not get any welcome message nor could open the mod menu.

What did I do wrong ?

Thanks for your answers.