Get ready for some work!
So your control arms are shot and your ride sounds like a 1930's Ford that squeaks all over. No problem, if the squeaking are your control arms then here is your write-up to replace them.
It is a good idea to replace the TRE's as well when you this as an alignment is a very good idea after ANY suspension related work. With new TRE's and CA's you wouldn't have to go back to the shop to get an alignment down the road when you replace either one.
Here is Chris Haigh's write-up on how to replace the TRE. Go by his write-up on how to remove and replace the TRE's and use mine for the control arms. Most Control Arm sets will cost around 500$, you get what you pay for so watch out for those 200$ sets on eBay. After all it's the suspension that keeps your tuned and personalized car on the road.
Your Control arms need replacement anyways if the boot looks like this which is torn up and fluffy.
Here are some other ways to check which arm is clunking.