Making Objects in Guis?

Hey,

Note: I am a very advanced scripter, so don't be afraid do use complex grammar and/or scripting terminology.

I was wondering how to make players have a 3D part/model in their guis? I've seen many games having it. I've tried making the part offset in front of the camera, then realized that it could still affect the player.

My Code:

repeat wait() until script.Parent.Parent.Character

local part = Instance.new("Part",game.Workspace)
part.Anchored = true
part.CanCollide = false
local char = script.Parent.Parent.Character
local cam = game.Workspace.CurrentCamera
local mouse = game.Players.LocalPlayer:GetMouse()

game.Players.LocalPlayer.CameraMode = "LockFirstPerson"
cam.Changed:connect(function()
    part.CFrame = cam.CoordinateFrame + (cam.CoordinateFrame.lookVector*2)
end)

If anyone out there know how to help, I'd be very appreciative.

Thanks ~ObscureEntity