You'll need a special cone to fit it, so you can stretch the boot over the shaft.
Is it necessary to remove or disconnect the lower wishbone?
No
Easiest way it found it was to:
A)1)undo the hub nut (30mm socket)
2)take wheel off
3)undo the suspension damper bolts (19mm IIRC)
4)pull the hub towards you,push it left and wiggle the shaft out from the hub and then pull the whole thing toward you and then it out.
B)1)Cut off the old clips and boot
2)Slide the on the small clip
3)get one of these cones and grease it up with some table polish
4)turn the boot inside out and grease up what is now the inside (but is actually the outside)
5)Side it over
6)turn back the right way and wipe it clean with some degreaser especially the bits on each end that will need to grip the shaft.
7)squeeze the cv grease into the cv joint, wiggle it about and push it in through the gaps
8)again make sure the grip areas clean, then pull the larger end over the joint and clip it in place with grips
9)then clip the bottom one and pull the shaft the each side to make sure the it doesnt slip off.
Refit in reverse of part 'A'
Think thats it from what I can remember off the top of my head.
Wish I had taken photos when I did mine but I didnt.
-Matt