This particular question is specific, but could aid in replacing other LC UI elements.
In this case i want to replace the resize handle image provided automatically by LC :

1: Do i need to dig into the LC application folder and find and replace the image there..?
Plus point.. easy.
Downside.. would need updating every time LC is updated.
Not sure.. if this would actually replace the image in an existing stack, or if the original image is already embedded in the stack somehow.?
2: Can i also interact with this image in some way..?
I would like to show the appropriate resize cursor when the mouse is over the image.
I currently don't know where i would write that script.
I don't see a message sent for mouse enter on that image.