@HarryWeezer
you can play any map solo from your machine to test it out. Well you can try to (This is off the top of my head here so I might forget something)
1 Load the game
2 change the mod (hit launch)
3 then select start new server set up the game type
4 select a map if your map folder is very small your new map may show up in the list if not just select one and go There are a few other ways to get that to work but for now use this method
5 bring down your console in game after a map has started and type in /map mp_scarecrow or whatever map name and hit enter the map should launch maybe lol
Good luck and remember were all pulling for you