Hi, I have just done one , it was easyjust six screws
remove the upper and lower steering column covers, undo the securing screw holding the switch to the column, it will come right away disconect the two plugs and replace,
don't forget to disconect the batt ( or the horn will sound continusly )and that there is a relay (a black square thing that plugs into the switch) for the indicators on the switch which you need to move over.
Barry
November 2008