Where do I put these textures for a map? (slb_snowsled_v3)

So pretty much any time I see this map it has the pink/black checker around the entire outside of the map. While I couldn’t see errors I found this thread: http://forum.facepunch.com/showthread.php?t=1221755 the links to textures there don’t work but I found them here - where do I put these, on server and on client(/fastdl)? I’ve tried a bunch of places but the black/pink issue still stays there, any help?

How is that scripting releated ?

???

I classed it under “developer discussion” as I feel textures and mapping in relation to a gmod server is developing, developing isn’t just coding