Get .sma file and find these.
Code:
// Player Models (randomly chosen if more than one)
new const model_nemesis[][] = { "zombie_source" } // Nemesis
new const model_survivor[][] = { "leet", "sas" } // Survivor
new const model_human[][] = { "arctic", "guerilla", "leet", "terror", "gign", "gsg9", "sas", "urban" } // Human
new const model_admin[][] = { "vip" } // Admin (human)
new const model_admin_zombie[][] = { "zombie_source" } // Admin (zombie)
// Weapon Models
new const model_vknife_human[] = { "models/v_knife.mdl" }
new const model_vknife_nemesis[] = { "models/zombie_plague/v_knife_zombie.mdl" }
new const model_vm249_survivor[] = { "models/v_m249.mdl" }
new const model_grenade_infect[] = { "models/zombie_plague/v_grenade_infect.mdl" }
new const model_grenade_fire[] = { "models/zombie_plague/v_grenade_fire.mdl" }
new const model_grenade_frost[] = { "models/zombie_plague/v_grenade_frost.mdl" }
new const model_grenade_flare[] = { "models/zombie_plague/v_grenade_flare.mdl" }
I think you need to change them in to your own.