renault scenic throttle body change?

hi all, recently brought a 1.4 16v scenic 05 plate and have had problems with it cutting out when trying to start it, the revs just die and it cuts out, this is now happening more and more, i have changed the pencil coils but no different i have read that the throttle body may need cleaning. my question is 'how' is it easy to do, i know its situated at the back of the engine under all the wiper scutttle, does all the plastic come off to give me more room?? or could there be another fault. thanks for any responses. todd.