rear springs are very easy
-disconnect the rear shocks from the axle
-jack the rear of the car way up (enough that you can support it under the frame in front of the rear wheels with jack-stands and allow the axle to just hang there)
-at this point you should be able to pry out one spring at a time with a large screwdriver or pry bar (you might need to jack up the opposite end of the axle just a little to force the side you're removing down a little farther)
HTH