It's not worth attempting the cambelt yourself unless you know what your doing. I'm not trying to say that you don't but it is a specialist only job. If you get a membership on Cliosport you'll be able to read about all of the horror stories regarding cambelt changes. a lot of them done by dealers and not just back street garages. Only a few dealers have the correct tools for the job and those that don't usually mess it up or won't attempt it.
You need the special locking tools from Renault to do it and the timing needs to be perfect as it'll kill the engine pretty quickly if not.
You need the special locking tools from Renault to do it and the timing needs to be perfect as it'll kill the engine pretty quickly if not.