If you are going to replace your lower control arm bushings, you will either need a ball joint press or probably better for a beginner would be to just bring them into a suspension shop and have them rebuild them for you. Just bring your parts and pay them to do it. This part requires some specialty tools, and some advanced skills I think. It's a pretty critical thing and you could do some serious damage if done wrong.
Like onick said if you have never rremoved springs before do some searching on here before you do it. Read everything you can about it and don't dismiss how dangerous a job it is. The springs really can kill you, or if your lucky just remove your hand for you if it goes bad. I too suggest finding somebody who has done this to help you out a bit, front end work is critical to be done correctly.