Mine's all done too. Pretty easy really. Didn't need wedges etc.
A bit of WD40 and a light tap and the old joint slid up the spline and off the box, then off the bottom of the shaft..
New joint went on fine. Slid the upper section all the way up the steering shaft spline, and the lower section fed onto the steering box spline from above.
Haven't driven it yet, but all the marks line up as before.