I have never had to compress the springs on any of the three different lift kits for my Kick and the spring unloading should not be a problem. My prievous comment was about the 'straping' the springs in a compressed position before removal. I have never tried this but after the spring flying out on the lowrider, I am still parinoid taking out my Kicks coils.
Like Wild mentioned it can easily be done with a floor jack and as long as the springs are properly placed in the cups they wont slip out.
Good luck, I hope you dont have to wait to long for the back order. Let us know how it goes.
Zig