how do i replace a rear spring on a ford ka?

the rear spring on my wifes ford ka has broken, and i am looking at replacing it myself. i want to know is it as straight forward as
1. jack the car up.
2. support the axle.
3. place a trolley jack under the damper.
4. undo the bottom retaining bolt.
5. slide everything out from the bottom.
6. put on new spring.
7. refit in the reverse order.