I replaced both sets of front and rear ARB bushes (as well as rear drop links)with their kits. Very straight forward and pretty simple...the rear ARB will require you to get a little creative with pushing the new bushes into the bar ends, but it's pretty straight forward.

Assassins guide is a good one to read-up on too, clarifies a lot of basic info that people don't understand.

Oh and also check your pannard bar bushes too, mine were warn and I also replaced them with polyurethane bushes...now that was far more difficult, but got there in the end with some brute force and some fair amount of swearing.