Here's what I did, I wan't to change the "Merely's Hoverboard" texture, in which I did by removing it's mesh, and putting the one I wanted. Now heres the problem when I test it, the Hoverboard texture I wanted is in my hand, and as soon as I click to make it spawn, it's the Merely's Hoverboard original texture (blue), how can I prevent that?
After I've glanced at the "Merely's Sparkle Time Hoverboard" gear, there should be a variable called "skateboardId" on the first line. The ID should be this: 124125886
That ID links to this: http://www.roblox.com/Skateboard-item?id=124125886
What you want to do is:
Grab that model and change the texture of that one.
Publish it.
Replace the value of "skateboardId" to the ID of your model.