Load up the game if you haven't already.Before we do anything,I'd suggest getting this mod:https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=265141458.That way when you load up any map,you'll have those weapons precached.After that is done,load any map with versus through console,via (console) "map mapname versus".Don't forget cheats.You'll need them.Once loaded in,go into console and type "sb_all_bot_game 1".This will allow you to switch teams without game ending!To switch to infected,again,go into console and type "jointeam 3".Great!You should now be a infected.Then type "ent_remove weapon_"infected name here"_claw".Now you shouldn't have your claws on whatever your infected character is.Here is all the CSS weapons list,rifle_sg552,sniper_awp,sniper_scout,smg_mp5 and that is it.If I missed one tell me.Then proceed to type in console "give "css weapon here" ".There you go!You should now have a gun while playing as a infected!You can not do this online.