Right i have done 5 of these on a MK2 Clio....not the easiest of ones to work in.
Your best of removing the lamps from the car, there is no way you will fit the kit with them on the car!
NOTE: You need to modify the lamps and clips to secure the HID bulbs, even tho they are meant to be a direct replacement, Renaults CRAP design means they dont secure like normal bulbs. This will render the lamps useless afterwards, as in you cant go back to normal bulbs in that lamp unit.
1) After removing from car you need to dremel the top half of the lamp unit so the new bulb fits in place snug.
2) Modify the brakcet (clip) with the dremel to allow it to fit over the rear of the bulb. iirc i had to take off 3-4mm of metal and shave a flat edge to it.
3) Now everything should clip back into place.
** Make sure the HID bulb has the return wire face down!!**
Otherwise you will be blinding everyone infront of you.
Connect everything up, but be carefull nothings broken as there are very high voltages going thru the kit.
That should be it really, make sure you locate everything where water will not get to.
Also remember there is no auto-leveling, so going up and down hills will cause trouble to other car users!