I have two 10" Kicker Comps im putting in my 2008 TL type S trunk and im about to purchase this Rockford Fosgate PBR500X1 to pair with it
http://www.sonicelectronix.com/item_...-PBR500X1.html

My question is How would i even begin to hook it up, especially considering the navigation system?

Im sorry for my ignorance, im fairly new to car audio.
Thank you in advance!

 

browse the forum, read, look at pictures, take your time
check out chrutchfield's web site to DIY articles
it's rather hard and time consuming to give a 1 on 1 car audio crash course you're asking for

 

Run power wire from battery through the grommet in the center of the firewall, and for the remote on wire get an add a circuit and put it on fuse 31 next to the hood release. Ground wire hook up to the fuel pump ground on the trunk floor. Remove factory sub from rear deck, cut wires and extend them to either a high level input on the amp or a line out converter to get a signal to the amp. The stock volume and sub levels will adjust the signal to the amp. The hardest part is getting out the rear seat and sub which isn't that bad. I'm not typing that up, google it cause you can find illustrations.