Its not too hard - have a talk to him and find out why he won't do it.
You'll need spring compressors, and a good socket and spanner set. Air gun makes the job easier too.
Jack the back up
Remove the rear trim up the sides of the boot, to reveal the top of the shocks.
Undo the nut you can see, and undo a bolt under the car, which releases the shockie.
Drop it out, and you can also get the springs out now.
Refit new spring and shockie, do up bolts nice and tight and repeat on the other side.
Then jack the front up, open the bonnet and get the wheel off.
Undo the top mount under the bonnet (thats the tricky bit, as you either need a special tool, or an air gun for the brute force method!)
Undo two bolts by the brake disks, and carefully remove the old suspension.
Make up the new suspension, cos you might need bits off the old ones.
Refit, and repeat
Easy as that pretty much