How do I animate large humanoid figures with script?

I am making a sort of survival game with a twist, and I'm trying to create somewhat of a boss for it. The dimensions for the boss are exactly three times the normal humanoid dimensions. The only problem is, simply dragging the animation script from a normal zombie to the giant one causes the giant to become disfigured and distorted. Bare in mind it does carry a sword with the dimensions also exactly multiplied by three. I was wondering if there was a way around this, or just simply a script someone could create for me? I've tried using several animation plugins but the limbs and head are never detected after selecting the root part of the "dummy". I also made sure to duplicate the joints within the torso and replicated the data from within the original zombie.

This is the current animation script, it is fairly independent:

function waitForChild(parent, childName)

    while true do

        local child = parent:findFirstChild(childName)

        if child then

            return child

        end

        parent.ChildAdded:wait()

    end

 end

 local Figure = script.Parent

 local Torso = waitForChild(Figure, "Torso")

 local RightShoulder = waitForChild(Torso, "Right Shoulder")

 local LeftShoulder = waitForChild(Torso, "Left Shoulder")

 local RightHip = waitForChild(Torso, "Right Hip")

 local LeftHip = waitForChild(Torso, "Left Hip")

 local Neck = waitForChild(Torso, "Neck")

 local Humanoid = waitForChild(Figure, "Zombie")

 local pose = "Standing"



 local toolAnim = "None"

 local toolAnimTime = 0



 local isSeated = false



 -- functions



 function onRunning(speed)

    if isSeated then return end



    if speed>0 then

        pose = "Running"

    else

        pose = "Standing"

    end

 end



 function onDied()

    pose = "Dead"

 end



 function onJumping()

    isSeated = false

    pose = "Jumping"

 end



 function onClimbing()

    pose = "Climbing"

 end



 function onGettingUp()

    pose = "GettingUp"

 end



 function onFreeFall()

    pose = "FreeFall"

 end



 function onFallingDown()

    pose = "FallingDown"

 end



 function onSeated()

    isSeated = true

    pose = "Seated"

    print("Seated")

 end



 function moveJump()

    RightShoulder.MaxVelocity = 0.5

    LeftShoulder.MaxVelocity = 0.5

    RightShoulder.DesiredAngle = 3.14

    LeftShoulder.DesiredAngle = -3.14

    RightHip.DesiredAngle = 0

    LeftHip.DesiredAngle = 0

 end



-- same as jump for now

function moveFreeFall()

    RightShoulder.MaxVelocity = 0.5

    LeftShoulder.MaxVelocity = 0.5

    RightShoulder.DesiredAngle = 3.14

    LeftShoulder.DesiredAngle = -3.14

    RightHip.DesiredAngle = 0

    LeftHip.DesiredAngle = 0

 end



 function moveSit()

    print("Move Sit")

    RightShoulder.MaxVelocity = 0.15

    LeftShoulder.MaxVelocity = 0.15

    RightShoulder.DesiredAngle = 3.14 /2

    LeftShoulder.DesiredAngle = -3.14 /2

    RightHip.DesiredAngle = 3.14 /2

    LeftHip.DesiredAngle = -3.14 /2

 end



 function getTool()



    kidTable = Figure:children()

    if (kidTable ~= nil) then

        numKids = #kidTable

        for i=1,numKids do

            if (kidTable[i].className == "Tool") then return kidTable[i] end

        end

    end



    return nil

 end



 function getToolAnim(tool)



    c = tool:children()

    for i=1,#c do

        if (c[i].Name == "toolanim" and c[i].className == "StringValue") then

            return c[i]

        end

    end

    return nil

 end



 function animateTool()



    if (toolAnim == "None") then

        RightShoulder.DesiredAngle = 1.57

        return

    end



    if (toolAnim == "Slash") then

        RightShoulder.MaxVelocity = 0.5

        RightShoulder.DesiredAngle = 0

        return

    end



    if (toolAnim == "Lunge") then

        RightShoulder.MaxVelocity = 0.5

        LeftShoulder.MaxVelocity = 0.5

        RightHip.MaxVelocity = 0.5

        LeftHip.MaxVelocity = 0.5

        RightShoulder.DesiredAngle = 1.57

        LeftShoulder.DesiredAngle = 1.0

        RightHip.DesiredAngle = 1.57

        LeftHip.DesiredAngle = 1.0

        return

    end

 end



 function move(time)

    local amplitude

    local frequency



    if (pose == "Jumping") then

        moveJump()

        return

    end



    if (pose == "FreeFall") then

        moveFreeFall()

        return

    end



    if (pose == "Seated") then

        moveSit()

        return

    end



    local climbFudge = 0



    if (pose == "Running") then

        RightShoulder.MaxVelocity = 0.15

        LeftShoulder.MaxVelocity = 0.15

        amplitude = 1

        frequency = 9

    elseif (pose == "Climbing") then

        RightShoulder.MaxVelocity = 0.5 

        LeftShoulder.MaxVelocity = 0.5

        amplitude = 1

        frequency = 9

        climbFudge = 3.14

    else

        amplitude = 0.1

        frequency = 1

    end



    desiredAngle = amplitude * math.sin(time*frequency)



    RightShoulder.DesiredAngle = desiredAngle + climbFudge

    LeftShoulder.DesiredAngle = desiredAngle - climbFudge

    RightHip.DesiredAngle = -desiredAngle

    LeftHip.DesiredAngle = -desiredAngle





    local tool = getTool()



    if tool ~= nil then



        animStringValueObject = getToolAnim(tool)



        if animStringValueObject ~= nil then

            toolAnim = animStringValueObject.Value

            -- message recieved, delete StringValue

            animStringValueObject.Parent = nil

            toolAnimTime = time + .3

        end



        if time > toolAnimTime then

            toolAnimTime = 0

            toolAnim = "None"

        end



        animateTool()





    else

        toolAnim = "None"

        toolAnimTime = 0

    end

 end





 -- connect events



 Humanoid.Died:connect(onDied)

 Humanoid.Running:connect(onRunning)

 Humanoid.Jumping:connect(onJumping)

 Humanoid.Climbing:connect(onClimbing)

 Humanoid.GettingUp:connect(onGettingUp)

 Humanoid.FreeFalling:connect(onFreeFall)

 Humanoid.FallingDown:connect(onFallingDown)

 Humanoid.Seated:connect(onSeated)



 -- main program



 local nextTime = 0

 local runService = game:service("RunService");



 while Figure.Parent~=nil do

    time = runService.Stepped:wait()

    if time > nextTime then

        move(time)

        nextTime = time + 0.1

    end

 end

Thanks in advance!

-ItsYourFav (zacster129)