What Jeep? Pretty easy on a TJ. Unbolt sway bar links, and the lower shock mounts. Jack up Jeep as high as you can and set on jackstands just behind the control arm mounts. Take front tires and wheels off. Let one side of axle droop to the ground while you jack up the other side. Should be able to yank the stock springs right out on the drooped side. I've done it by myself with 3" springs, but it's easier with a friend to push and pull on stuff. Hardest part could be getting the bump stop cup unbolted if it is rusted. The bolt is under the bump stop that you will have to remove from the cup.
In these pics I was removing a 1.5" spacer on top of my 3" springs and replacing with a .75" spacer. Took about an hour and a half, by myself, with a couple beer breaks.