Ya the rears are easy for any se and up but for the s model with the... crank windows in the back... it was very tricky. Word of advice, search the towel trick on YouTube to get the clip off of the window crank. And don't mess up like me and assume that the clip is on the inner part touching the panel, it's in between the handle and the plastic ring. Good luck and happy modding.
PS. I went with JL audio CD components in the front, cheap Alpine type E fillers for the back and amplified them with a JL 360/4 and it sounds beautiful. Very glad I got to spend my extra $1000 on something other than Sony.