I've been on this forum on and off for a couple years now but only for downloading the map manager and custom maps. Right now I'm looking for friends to play custom zombies with so if you want you can add me on steam https://steamcommunity.com/profiles/76561198164487535/

Well you don't need any programs. Most of it is self explanatory. Normally you just google the map and once you find it make sure it is an .exe file. Also depends on what browser you use. If you have anymore questions just add me on steam if you want. I'm trying to find some friends to play custom maps with also. https://steamcommunity.com/profiles/76561198164487535/