well, you didnt say what kind of springs you have and some may be longer than others. i have motorsport c springs and the fronts can fit in without compressing.
first pick the front or rear to do and jack it up and use jack stands.
front - remove wheel, remove caliper by remove the c-clip and pin and support with something so it doesnt hang by the brake line. now, place floor jack under the a arm- undo strut by taking the 2 lower bolts off. then loosen the sway bar end link nut on the top. SLOWLY lower the jack and the a arm should fall with the jack. (be careful spring is still under tension and can fly out.) lower it all the way and the spring should still be in its place. (i then pressed down on the a arm some and it was loose enough to remove) some car i have done the spring needs to be pryed out..be careful. replace spring and re-install as taken apart.
rear - remove tire. place jack under control arm, then remove bottom shock bolt and quad shock. lower jack and there should be enough clearance to get spring out..
the first time i did this on my car it took 6 hrs...and the last time i did it was about 1.5 hrs...so...it may take a while but this is the quickest way i have found yet.