Jack it up and remove the wheel.Remember to use an axle stand, leave the car in gear and block the front wheels as you will be applying a lot of force to undo the hub nut.
Use a screwdriver to prise off the cap in the centre of the drum then remove the hub nut. IIRC it's a 30mm nut and it's on tight! You'll need a long breaker bar or an impact gun to undo it.
I strongly recommend you buy a Haynes (or similar) workshop manual for this car before starting this job as there are a number of springs, clips, levers and adjusters involved. One part incorrectly fitted and the consequences- for others as well as yourself- are obvious.
Haynes books cost about £18 and are available in Halfords or most bookshops.
Brian.J., August 2008