Use strchr instead of strstr with specially constructed string255 struct (not tested)
function detectMap()
if RopePercent == 100 and MinesNum == 0 then
if LandDigest == "M838018718Scripts/Multiplayer/Racer.lua" then
return("Racer Challenge #1")
elseif LandDigest == "M-490229244Scripts/Multiplayer/Racer.lua" then
return("Racer Challenge #2")
end
end
end