If you are going to replace your lower control arm bushing you're going to have to remove the coil spring. I don't think there is a safe way to take that bushing out without removing the control arm from the car. The spring staying in would mean the control arm stays in. I just did my whole front end this past summer. I borrowed a spring compressor from a member here goes by DeliveryValve - Here's info:
http://www.peachparts.com/shopforum/member.php?u=33259, you'll have to grind the access holes at the top to get the tool in the holes.
Here is my parts list for the rebuild.
Upper control
Control arm bushings
Lower control arm bushings
Lower ball joints
Guide rod mounts
Idler arm
Shock bushings
Wheel seals
Steering damper
Drag link
Tie rod assemblies
You could also put in new shocks and springs if you wanted.
This is a pretty big job, but there are several DIY threads here on doing it. It requires the spring compressor and a C - press to press in the ball joints. You can rent a press from most local parts stores, just make sure you take the ball joint in and can get a collar to fit over it. You'll also want the Factory Manual, it helps a ton.