ive just finished fitting my rear beam on.
all you have to do is
knock the handbrake cable out of the holders
disconnect 2 brakelines
4 cross member long bolts
i did this all from under the car, if youve got 2 jacks then the job is easy by yourself.
remove spare tyre holder
back box
drop one end of the zorst section
undo brakelines
place the jacks eitherside of the beam
undo the bolts and away you go
lower jacks and slide em out