Remove the nut on the wiper arm
Take off the inside plastic panel from the boot & disconnect the wiring plug to the motor.
Spray plenty of WD40 onto the spline that the wiper arm sits on (this is the hard bit to get off- leave the 3 bolts done up on the wiper motor until uve removed this arm, this should give a bit more support to the glass)
Once the arm is off unto the 3 bolts on the wiper motor
Then gently pull the motor and spindle back through your boot so its clear from the glass
then fit the pug de wiper kit or a gromet and make sure that its sealed well
Thats about it

As said before though make sure the arm is lubed up on the spindle as this easily seizes