How do I replace my tablet's LCD display?

I have a DigiLand dl8006 that was stepped on and the display broken. The glass itself is fine, and the touch seems fully functional, but when I turn it on the screen is completely messed up. I also have another tablet exactly the same that stopped charging a while ago but the screen worked fine. How, if possible, would I go about taking the working screen from the old one, and putting it onto the one with the broken screen?