Add 2nd optional parameter to HedgewarsScriptLoad. If false, its OK if file does not exist. Also, return true/false on success
file(GLOB luafiles *.lua)
file(GLOB cfgfiles *.cfg)
file(GLOB hwpfiles *.hwp)
install(FILES
${luafiles}
${cfgfiles}
${hwpfiles}
DESTINATION ${SHAREPATH}Data/Scripts/Multiplayer)