easy, normally... you need to unhook the screen and your wireless antennas, then unscrew the hinges and lift the screen out of the case then you undo about 6 screws holding the screen bezel on and pop that off carefully with a small screwdriver and some pulling. then the hinges will be exposed. depending on the type you may have to pull the screen out or not , but it should be self explanatory from there
i do this all day for work lol
should take less then a half hour your first time, takes me about 10-15 min but i do it a lot