actually it's not hard, there is a DIY in the forms for it. I'll try and find you the fully layout.

 

Look here,

http://www.twinsaabs.com/9-5_repair/suspension/rear/intro.asp?nsteps=6

 

Or here

http://photo.platonoff.com/Auto/20070930a.Saab_9-5_Rear_Suspension/

or here

http://www.fixmysaab.com/9-5_repair/suspension/rear/intro.asp?nsteps=6

 

The rear shocks are easy to replace, you will need a tool to compress the spring. Also, the top bolt may be tricky if you have rust there but otherwise not complicated.

 

I just changed mine out last month. After 7 years, the top bolts were rusted in. Ended up taking to a place that had a nut-cutter that basically went on over the top and used an impact wrench to spin the cutter and it split the nut right in half. With a couple of taps on the shaft with a small sledge the strut popped right out.