as benR says its not that difficult, keep the reciept for buying alternator, but dont get renault to fit it. its fairly easy to remove slam panel, radiator and headlamp, and you then have loads of space. 7mm allenkey to loosen center of tensioner, turn outside nut to relieve tension. Unbolt the two 10mm bolts on lower timing belt cover, pop off, put new belt on, tension and then put cover, haedlamp etc back in. Time consuming but not difficult