Installing a radio

[2002 LS V8]

Ok I've done some searching and read all the posts. What is the best way to install a dual din unit in the LS? I’m thinking of going with the part from the newer LS. What paint would you guys use?

What else do I need to buy? Do I need a wiring harness? Any other controls, kits, or units? (I’m installing the D1 by the way)

Thanks