I guess you will soon be eligible for a frequent posters card on here : o) They way i did it was to initially remove the grille, you may have to snap the plastic tabs at the top retaining screws. then you will have restricted access to the underside of left and right hand locks - you need to push left and pull right, if i remember correctly (cd be the other way round) to open the retaining "crescent, and allow the bonnet catch to release on each side.
I did read a post once that said you could magically lie below the car and get a long screwdriver and do all this from underneath the car, but I couldn't see any way in myself.
Good luck - it's not so hard, but needs a bit of patience, and a decent light so that you can see what you're doing