you can check the spring install link in my signature for the front upper control arms. The rears should be even easier, but unfortunately i don't have the torque specs for them.

 

Keep in mind the 18 has a different setup than the rest. So CLUM's DIY while excellent may vary from your actual experience on the front. It should be pretty straight forward though. If you're savvy enough to remove some of the stuff, you can figure out how to do the rest. Just make sure spring tension is relieved properly before you go popping out any arm bolts.