I've heard that you can do it without disconnecting the lower ball-joint but I have never done it that way. To do it this way you would have to remove the inner piviot bolts for the lower control arms and lower it with a floor jack. The way I have done it is to undo the lower ball-joint and drop that end with a floor jack...but you will mess up the dust boot with a pickle fork and most will not come off any other way. That means you will also need a new ball-joint.
Either way you will most likely need a INTERNAL spring compressor which you can rent for free (just a deposit that you get back) from AutoZone and maybe some other parts stores.
I would not recomend just doing one. It isn't that hard of a job but some of the stuff can be tough to go back together.