Sorry to hear you are having problems
I have been through the process a few times by now.
Don't know if you have a 1.6 or 2.2, but the process is pretty much the same anyway!
You will need to take off the anti roll bar, disconnect all wires and hoses from the engine (you don't need to take off the brake hoses or hand brake cable, so don't).
Then jack up the rear if you don't have an autolift handy?
Take off the wheels, and screw out the centre nut holding the drive shaft. You will need a large "spanner" for this (if my memory is correct 36mm) and an assistent activating the brake pedal.
Now you are at the critical point, and praying to the automotive god's should be done
After praying grab you spanners and loosen the 2 bolts securing the rear trailing arms. The bolts are prone to rust to the bush's in the trailing arm.
If so I can recommend an electric "hack saw" to cut the bolt(s) and a hydraulic press afterwards to change the bushes...
Unfortunately there is no way around taking the rear trailing arms off (I have tried a thing or two, even taking the diff off the gearbox), but when this have been done once, and the bush/bolt have been greased at assembly they come off without much effort...
When the trailing arms are off, you can easily remove the driveshafts (they are simply pushed into the gearbox differential).
From here it's pretty much straight forward.
Check that you have disconnected all wires, hoses and linkage to gearbox and carb. (remember the hydraulic clutch as well).
When everything else is removed take off the generator (it's a no go if not removed on the 1.6) then the 3rd engine mount (at the bottom keeping the engine from rotating).
Now lower the car so that you can "jack up" the engine and undo the 2 final engine mounts.
When these are removed you should be able to slowly lift the car without the engine
If you need pictures let me know, I have been through the procedure last week
If everything works out fine, and your trailing arms comes right off you should be able to do the job in 3-5- hours.
Hope the above is usefull... let us know how you get on?