Setting default gamemode on Hammer

I make the entity info_gamemode on a map in Hammer so when the map is loaded is under fretta. the default values of this entity is GamemodeName fretta but the problem is the model is missing and still is the** weapon_pistol **active. So i have two question how to disable weapon_pistol by default and what is the value to specify the playermodel? i tried **PlayerRequestClass models/barney.mdl **but doesnt work

Setting Default Gamemode
Configuring hammer to work with gmod

**Edit : **So there is another solution like spawn player in hammer with no pistol weapon and spawn a player with a default model? how to do it on Hammer?..