abbreviatur3

Sorry for my English in advance. The question is: is there any kind of mod, that spowns all kind of zombies from the start, ass it happens in the late story progress? ...Or may be some one now what to edit to make this happen? I know that this is in thous files: "common_spawn_presets.scr", "night_spawn_presets.scr" and "wasteland_presets.scr", but what exactly should i edit?