I found the rear bushes the easiest to remove, i just stuck a suitably sized lever bar through the hole and levered them out, took abit of brute force but it pulled the rubber clean out and left the casing in there, which was easy to remove
When fitting the new rear bush just stick it in a vice with a peice of plate behind the bush to spread the load and wind the vice in, a small amount of jiggling is needed to get the lip over. This is with the Polybushes btw.