Ball joint is definitely on the hub not the lower arm, its the same design as an EG or DC2
You can change them at home with a G-clamp but a press tool is better, some places like machine mart offer a rental service occasionally, Heres a quick guide I've used in the past Except used a long pry bar against the chassis and stepped on it
http://www.civicforums.com/forums/119-suspension/340010-ball-joint-diy-v-2-no-air-hammer-necessary.html