The clutch sits between the engine and the gearbox - to get access to it the two need to be separated. A Haynes manual may be a good investment - Amazon sell them - either that or take it to a garage.
Here's a drawing...
http://z.about.com/d/autorepair/1/0/C/J/clutch.jpg
You will need special tools - not really the job for an amateur.
Peccavi, March 2010
