First, if not removed correctly, you can really hurt and possibly kill yourself. The front springs are under a lot of pressure and if you get the ball joint separated without a jack under it, you will hurt yourself. I have removed mine on my 01 Cobra and also replaced my ball joints and replaced the bushings with polys. You need some specialty tools. If you've not done this kind of job before, I really urge you to be VERY careful or consider going to a shop.
I did a write up on SVT Performance for New Edge Mustangs to replace ball joints with photos. That does not show removing the front springs, however.
BE CAREFUL if you try this. And, it is hard to get the springs back in once they are removed.