How do you change the clutch cable ?

Hi there,
New clutch cable on order with local Fiat garage ( and quite a bit cheaper than some of the local motor factor outlets ), but can anyone tell me the right way to change the cable please.
Having picked up a £30.00 fine today for driving a small van along Birdcage Walk, London, today ( the locals apparently don't like trade vehicles around the royal parks.......stuck up toffs ), it is now a certainty that I have to do all repairs, big and small.
Please help, cheers.

P.S. Anyone out there need a driver ( up to 7.5t ) used to flexible hours and willing to do days, nights, shifts UK and continental driving, but willing to pay more than the n.m.w, in other words, an honest wage for an honest days work? £15,000 for 50hrs p/w and continental hours not included in total driving time at present. Just want to keep a roof over the families head and pay the bills, without fighting to stay awake doing it.

hi,
is the cable for a petrol or diesel?
you can change the diesel cable but it is a dealer job to change on petrol ulysse
regards
paul

Its a P reg 1997 1.9tds ( Diesel ).
Any help appreciated :-)