I had never done anything like a spring install and put in some pro kits. I did a pretty detailed write up and put it in the how to section so you might want to check it out. As far as spring compressors, go to autozone and they will give you one for a $40 deposit that you get back when you return the compressor. I wouldnt really think you need one unless the teins dont come with the top mounts but being a true coilover setup i would think they did but i could be wrong