Depending on the severity of the green lane you shouldn't need to do much at all. The only basic things that you absolutely need are front and rear recovery points and a friend or two to go with.
You've got the tyres sorted, sure you can fit steering guards, underbody suspension, winches and bumpers and lifted suspension but if you need all that gear to drive a greenlane it probably means it's far too destroyed to drive and you'll only damage it more. In which case you might wanna turn your attention to pay n play days or trialling at your local Land Rover club.