[12114]

does every custom map has to have a .res file in order for it to work, or?

[seriousspot]

Fastdl rest same, just some speed optimisations and directory changed, for the custom maps if they doesen't have .res file you may create yourself but only if map got custom resources such as models/gfx/sounds and etc, anything that server uses and you put in fastdl folder in your ftp or whereever you host it works, just make sure you store everything that clients need otherwise crash result.