Fitting fog lights.....where to start?

Not sure if the wiring's in the harness as standard, but even if it isn't, it shouldn't be too hard.

Basically, you want am auxilliary lighting relay, using the fog switch pull as your trigger, and probably chop the dip beam wire to provide your +ve rail. There must be a million wiring schematics for fog and driving light wiring lurking a google away... Probably a good plan to put an in-line fuse in circuit too, so that if anything does go sparky you don't lose your dip beam fuse too...