i changed mine to blue l.e.d's
u just ahve to take the clocks out (remove the light switch and airbag light on the right, and the dash blank on the left next tot he stereo, there will be 2 screws, undo them and then the clock fascia comes off) just undo the screws holding the clocks in then and pull the unit out.
then you take the old bulbs out along with the green strip, put your new lights in (i presume you have a kit with correct shape l.e.d's/bulbs) and replace them with the new ones
then in traditional haynes style, refitting is the opposite of removal
