<font face="Comic Sans MS"><font size="2"><font color="blue">There are probably loads of different ways of doing this, but I'll suggest 2, not knowing what facilities you have.
<b>CAUTIONARY NOTE:</b>Undo the shocks at the bottom if you can or they'll stick up so far that you'll have to raise the car an extra foot or so to gain clearance! With the wheels left on, the assembly is heavier and you will need to raise the car higher, but you have more stability when man-handling the assembly out of the way. With the wheels off, the whole assembly is a lot lighter and you don't have to raise the car as high, but the whole assembly is quite unstable. When lifting the car, be sure to raise it high enough so that you can roll the whole axle assembly backwards in one piece.
Option 1)
With my wheels left on to ease withdrawal later, I jacked the rear end of the car up using a (large) trolley-jack, with the saddle of the jack resting under the diff housing. I then put axle-stands slightly forward of the trailing arm mounting points, leaving the trolley jack in place while I undid all the bolts. Once all bolts were undone, I lowered the trolley-jack and the whole assembly came down under control. If you don't have the luxury of a trolley jack, then
Option 2)
If you only have a normal jack, you could undo all the bolts with the car sat on the ground, then "walk" the car up by jacking each side up a few inches at a time and using axle-stands to hold the car while you take the jack to the other side. As the car raises, so the assembly will stay on the ground and once you have clearance, it can simply be rolled back.
I hope this hasn't been teaching your granny to suck eggs, but good luck. I didn't find it too daunting, but a bit of grunting and puffing and all went okay.
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The pheonix rises from the ashes - just give it time!

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