There's no room for an internal spring compresser, and I don't think there's much for the external type either (which is good- I don't like those).
I was able to get mine out without a spring compresser.
-Support the car's frame on jackstands
-disconnect the sway bar end link
-unbolt the clamp holding the hard brake line to the frame
-preload the strut with a floor jack
-unbolt the upper strut nuts on top of the shock tower
-slowly lower the jack and guide the strut down and out of the wheelwell
You should now be able to remove the spring as you push the lower a-arm as far down as it will go. It will be under very little tension, but if it makes you feel better, lash it to the frame with a length of chain. You may need to use a pry bar to pop it up and over the lip of the seat on the a-arm.
The new springs go in easily, since they're shorter! (duh)