There would have to be a 'How To' thread around here some where??
Its easy as.
Basically theres 3 (?) black twist knobs inside the boot behind the tail light area, untwist them, becareful when your doing the last one, (so you don't drop your tail light)
Pull down the carpet on the side of the boot - behind the tail light, unplug the wiring, and push the rubber grommet out towards the tail light.
Gently pull the tail light towards the rear of the car - straight out.
Twist the globe holders to get the bulbs out...
Fitting, reverse of the removal, might need to pull the boot seal off a bit, just near where the tail light sits up tight next to it, then push it back on.