Is there a way to use multiple models in this?

local PhysicsService = game:GetService('PhysicsService')
local Players = game:GetService('Players')

PhysicsService:CreateCollisionGroup('Players')
PhysicsService:CreateCollisionGroup('NPCs')
PhysicsService:CollisionGroupSetCollidable('Players', 'NPCs', false)

local NPC = game.ReplicatedStorage.EventEnemies.Mini

local function SetModelGroup(Model, Group)

    for _, Part in ipairs(Model:GetChildren())
    do
        if (Part:IsA 'BasePart') then

            PhysicsService:SetPartCollisionGroup(Part, Group)
        end
    end
end

local function OnClientAdded(Client)

    local function OnCharacterLoaded(Character)

        SetModelGroup(Character, 'Players')
    end

    Client.CharacterAppearanceLoaded:Connect(OnCharacterLoaded)
end

SetModelGroup(NPC, 'NPCs')

Players.PlayerAdded:Connect(OnClientAdded)

This script makes a NPC non collide able, but theres more than one model, I tried to create multiple scripts for each mode, but it didn't work. I tried multiple ways to make more than one NPC model work inside of a script but none of them worked. Is there a way to make multiple models work with this script? hopefully that made sense