How much of a job depends on wether the wiring is already in place or
not, sometimes the cables to the back of the lights is already there
just needs to be plugged in. The sockets for the mounting bracket is
moulded into the bumper so is the screw hole. However the little
threaded fitting probably isn't there so you will need this. It's best
to take a squint see what is there then go bug your local dealer parts
dept! They have diagrams with all the bits needed. However they
probably won't sell the wiring loom, you need to visit the scrappy for
them.

Bear in mind the lights ain't cheap new so it may be worth scouting
somewhere like E-Bay for em. I just sold a set of Ghia fogs on there
for £46 complete with trim and mounting bracket. Mine were swapped for
ST170 lights as they match the Xenon head lights better.

Regards

Andy Lee