i order and install sirius radio about 1 month ago. its actually quite simple to install. I located with velco the receiver in the trunk velco-ed to the trunk wall carpet. Here are my install steps.
1. dont try to removed the Head Unit. Simply removed the glove box by pushing in on the install walls and then pull the box up.
2. Removed the door sills. These are hard to remove for the first time so dont worry about using some force. Simple insert a screw driver underneath (cover with cloth so it doesnt stratch). Pop both the passenger side door sills, both front and back.
3. Next, reach through the glove box opening to the back of the HU. The hole to insert the wire is located on the side closest to the glove box.
4. Once the HU is plugged in, run the cable along the frame of the car, and then up under the back seat. Lift the carpet up in the trunk and run it all the way to the back.
5. Use zip ties to secure it every 2 feet or so.
6. Replace glove box, and door sills.
7. Place the antenna on the back trunk in the middle compression...i placed mine one the childs metal bracket on back.
8. Run this wire along to the trunk and zip it to the wire coming from the HU.
9. Replace the trunk carpet and located a velcro stop for the receiver.
10. plug in antenna.
11. call company to active
12. set up preset stations.
13. enjoy.
Sorry if these dont make sense. I drafted it quickly and dont have the time to read this right now. If it indeed doesnt make sense, i will follow it up with a better post later, unless someone beats me to the punch. Hopefully, this helps out though.
Enjoy!