I'm installating my system tomorrow!!
I just wanted to make sure of a few things before I do though, and I would appreciate some of the more experienced posters to confirm (or correct) me!
For automatic, put the car in neutral, parking brake on.
Disconnect the NEGATIVE/GROUND cable from the battery
Run the power lead from the positive battery terminal through a grommet that I have to cut which is up high on the passenger-side firewall (as discussed here). I also need a fuse within 2 feet of the battery
To remove the panels to run the cable, I'll refer to the PDF for the OEM sub install.
I'm putting the amp under the seat, so I'll remove the seat but leave the two plugs (assumingly side air bag and the "is there someone sitting here so i can flash the seatbelt light" sensor) plugged in. I'm not so sure I want to unplug the airbag wire, but if it makes no difference because the battery is disconnected, someone please let me know so I can take to seat out of the car.
I'm running the patch cable through the center console to keep it away from the power lead. I'm hoping that this how-to on installing the OEM sub and light kit, will show me how to remove enough panels to get to the seat. Is there anything I should know about doing this?
Amp turn-on wire will run the same route. I can just use any 16-guage wire, right??
Ground wire will go onto one of the seat bolts.
I'll run the speaker wire to the trunk, via the side as explained in the OEM sub install PDF.
Some other notes... I'm "mounting" the amp with "Industrial-Strength" velcro from Wal-Mart. Any objections to that? I've made my own patch cable with a twisted Ethernet cable (thanks Alpman!!) and I've tested it and it works! To use my factory head unit, I bought one of the adapters from euro_werks on eBay (like this).
I know this is a lot to ask of people to answer, but I know you guys are extremely helpful! As always, thanks a lot!
I've done this before on two of my previous cars, but I want this to be something that I'm proud of because I did it myself, and it looks clean and professional. That's why I'm asking for guidance.
Thanks!

I just wanted to make sure of a few things before I do though, and I would appreciate some of the more experienced posters to confirm (or correct) me!
For automatic, put the car in neutral, parking brake on.
Disconnect the NEGATIVE/GROUND cable from the battery
Run the power lead from the positive battery terminal through a grommet that I have to cut which is up high on the passenger-side firewall (as discussed here). I also need a fuse within 2 feet of the battery
To remove the panels to run the cable, I'll refer to the PDF for the OEM sub install.
I'm putting the amp under the seat, so I'll remove the seat but leave the two plugs (assumingly side air bag and the "is there someone sitting here so i can flash the seatbelt light" sensor) plugged in. I'm not so sure I want to unplug the airbag wire, but if it makes no difference because the battery is disconnected, someone please let me know so I can take to seat out of the car.
I'm running the patch cable through the center console to keep it away from the power lead. I'm hoping that this how-to on installing the OEM sub and light kit, will show me how to remove enough panels to get to the seat. Is there anything I should know about doing this?
Amp turn-on wire will run the same route. I can just use any 16-guage wire, right??
Ground wire will go onto one of the seat bolts.
I'll run the speaker wire to the trunk, via the side as explained in the OEM sub install PDF.
Some other notes... I'm "mounting" the amp with "Industrial-Strength" velcro from Wal-Mart. Any objections to that? I've made my own patch cable with a twisted Ethernet cable (thanks Alpman!!) and I've tested it and it works! To use my factory head unit, I bought one of the adapters from euro_werks on eBay (like this).
I know this is a lot to ask of people to answer, but I know you guys are extremely helpful! As always, thanks a lot!
I've done this before on two of my previous cars, but I want this to be something that I'm proud of because I did it myself, and it looks clean and professional. That's why I'm asking for guidance.
Thanks!