SLE got the rear speakers down, and the doors. (rear speakers can be removed from the top w/o taking out any bolts/screws)
The radio/HU is very simple to take out. The plastic piece that surround the radio and goes up over the steering wheel (the one that has the vents in it) simply pulls out. I normally start pulling on the left side where the gauges are. Then you can slide your fingers over to the right side. pull that out. then keep pulling down the right side of the plastic and go back up the left. once it is all loose, I find it easiest to lower the steering wheel as far as possible and take the plastic out. The HU is held in with 3 screws (yours should be the same as mine) and from there it slides right out.