renault megane1.5dci 2006 gearbox removal

hi all had some great help off there in the past my renault megane dci started loosing cluctch fluid out of bell housing so ill have to change the slave clutch ect what i need to now is when i take the subframe off and gear box out how to go about changing the clutch is it take off and just bolt on or and special tools needed any help on doing this or tips will be very helpfull and again thankyou or does any body now a step by step on doing the whole job from start to finish