Pretty simple. Don't even need a spring compressor.
1st: Remove codder pin on the top castle nut on the spindle.
2nd: Get a jack and put pressure on the lower a-arm, then loosen the top castle nut on the spindle.
3rd: Take off the brake hose bracket on the upper a-arm, and take off sway bar (only the side your working on)
4th: Take castle nut all the way off, then slowly, slowly lower the jack. Be very very carefull, spring is under compression while all this is happening.
5th: remove spring, insert new spring. Then just reverse the process.