[randyzimmer]

Like it says,
How to replace a rear spring.

http://www.randyzimmer.com/smart/springs/rear/rearspring.mpeg

Give me a break, I decided to do it on the way home for lunch and was only 5 minutes late getting back.
That was after "editing" too.
Could be better and I probably will cut some dead air out but...
I was in a hurry!

If you have stock springs, put a jack under the swing arm before you take out the shock bolt.
On the left side, don't go further down than you must as the axle gets really stressed on that side.

 

[stuberman]

The link above does not work - here is the same video on YouTube:

 

[stuberman]

Thanks for the video @randyzimmer14
The short version:
Remove the lower shock absorber bolt
Use a jack to lower the de Dion tube (pushing above against frame) and remove the rear spring (no spring compressor needed)
Torque the shock bolt on to 50 foot-lbs