On the back, we just supported the frame on a jack and jack stands and let the rear suspension drop, careful of the brakelines. Those springs came out easily after we removed the cheapo stock retainers.
On the front, we did the same procedure supporting the car on the frame with jack stands. The suspension drops a quite a bit, but just not enough to pull the springs out. We put the stock little parabolic jack in between the axle and frame and jacked it apart the rest of the way and pulled everything out and put the new ones in without a spring compressor. Again, just be careful of the brake lines. I read that jack trick somewhere (probably on this site) and thanks to whomever out there! Its a snap.
'95 Alpine SW 339/500