hi all, my b friend has a 02' stock IS. i want to surprise him with a DVD AND NAV system for Christmas, but i need some help...I have searched through the forum and have not found suffice information, most likely b/c i have ZERO idea what im attempting to accomplish. but, where is the best spot on the dash to install this piece? can it be placed where the stock NAV COULD have been installed on top of the dash where it rises up?or should i replace the stock stereo with a retractable screen, ie kenwood, clarion, along with the new cd player that comes with these units? i know this is elemtary and annoying but any help would be appreciated. thanks so much, carrie.