Basically, dont flood them into one folder in the Custom folder. With the model files, extract the the stuff that used to go into the cstrike folder into its own folder. Put that folder where you extracted the materials etc. and place it in the custom folder. Now start your game. If you go into a server like jail or Minigames, world models wont load due to vertexes not matching the maps(If already there, bought weapons work fine).