Ive changed all mine but then realised i didnt to the ties up tight enough and now i have grease all under my car.
Its pretty easy to do, Wheel off, Middle nut out, losen end of drive shaft and take it out. A rattle gun is very handy to use also.
Also once u got it off take it to the C.V joint and drive shaft place in edwardstown, same rd as doyle crash but closer to south rd. They are roughly $15bucks each with grease.