Just done this on my cup again yesterday - it's not a hard job really
There's 2 bolts holding the ball joint to the wishbone - slacken those off - remove the 17mm pinch bolt that goes through the bottom of the strut
Then hammer a fork splitter inbetween the hub and ball joint till it pops out - can take a fair bit of hammering and abuse lol
The new one you just tap with a hammer till it's in the bottom of the strut - fit the pinch bolt - then bolt it back to the wishbone
Do everything up very very tight - job done