How to edit Pre-Existing Script From Script?

First of all let me say I don't want a script, I need an explanation.

So The Roblox skateboards are great, and I'm trying to make a game featuring many different skateboards and skateboard effects.

The problem is, the way it works is it inserts it using a service and probably gets it from the website or something, And it makes a new one every time you place it down.

This is a problem because I can't really change anything about the skateboard.

If anyone has any idea how to do this, that would be fine.

If you want to see the script, here it is:

Tool = script.Parent
Handle = Tool:WaitForChild("Handle")
Mesh = Handle:WaitForChild("Mesh")

Drop = Handle:WaitForChild("Drop")

Players = game:GetService("Players")
InsertService = game:GetService("InsertService")

SkateboardId = 160740096

SkateboardModel = InsertService:LoadAsset(SkateboardId)

Skateboard = SkateboardModel:GetChildren()[1]:Clone()
Skateboard:WaitForChild("SkateboardPlatform"):WaitForChild("Mesh").TextureId = Mesh.TextureId

SkateboardModel:Destroy()

ToolData = Skateboard:WaitForChild("SkateboardPlatform"):WaitForChild("Tool")

ToolName = Instance.new("StringValue")
ToolName.Name = "ToolName"
ToolName.Value = Tool.Name
ToolName.Parent = ToolData

ToolIcon = Instance.new("StringValue")
ToolIcon.Name = "ToolIcon"
ToolIcon.Value = Tool.TextureId
ToolIcon.Parent = ToolData

ToolTip = Instance.new("StringValue")
ToolTip.Name = "ToolTip"
ToolTip.Value = Tool.ToolTip
ToolTip.Parent = ToolData

ToolGrip = Instance.new("CFrameValue")
ToolGrip.Name = "ToolGrip"
ToolGrip.Value = Tool.Grip
ToolGrip.Parent = ToolData

ToolTexture = Instance.new("StringValue")
ToolTexture.Name = "ToolTexture"
ToolTexture.Value = Mesh.TextureId
ToolTexture.Parent = ToolData

function TransformModel(Parent, NewCFrame)
    Parent:MoveTo(NewCFrame.p)
    local Origins = {}
    for i, v in pairs(Parent:GetChildren()) do
        if v:IsA("BasePart") then
            Origins[v] = Parent:GetModelCFrame():toObjectSpace(v.CFrame)
        end
    end
    for i, v in pairs(Origins) do
        i.CFrame = NewCFrame:toWorldSpace(v)
    end
end

function DropSkateboard()
    Drop:Play()

    for i, v in pairs(Skateboard:GetChildren()) do
        if v:IsA("BasePart") then
            v.Anchored = true
        end
    end

    InsertService:Insert(Skateboard)

    local SkateboardCFrame = Torso.CFrame + Torso.CFrame.lookVector * (((Torso.Size.Z / 2) + (Skateboard:GetModelSize().Z / 2)) * 1.5)
    local SkateboardAngle = CFrame.Angles(0, 0, 0)
    TransformModel(Skateboard, SkateboardCFrame * SkateboardAngle)
    Skateboard:MakeJoints()

    for i, v in pairs(Skateboard:GetChildren()) do
        if v:IsA("BasePart") then
            v.Velocity = Vector3.new(0, 0, 0)
            v.RotVelocity = Vector3.new(0, 0, 0)
            v.Anchored = false
        end
    end

    Tool:Destroy()  

end

function Equipped(Mouse)
    Character = Tool.Parent
    Player = Players:GetPlayerFromCharacter(Character)
    Humanoid = Character:FindFirstChild("Humanoid")
    Torso = Character:FindFirstChild("Torso")
    if not Character or not Humanoid or Humanoid.Health == 0 or not Torso then
        return
    end
    Mouse.Icon = "http://www.roblox.com/asset/?id=22858207"
    Mouse.Button1Down:connect(function()
        if Humanoid and Humanoid.Health > 0 and Torso then
            Mouse.Icon = ""
            DropSkateboard()
        end
    end)
end

Tool.Equipped:connect(Equipped)