A:Answer Hello Erin-
Really it is hard to say what we're able to add on without first looking at the workmanship prior to the installation. I'd recommend stopping by your local Best Buy to speak with a Geek Squad Autotech.
It is completely possible and I do hope you're able to get this taken care of, but I would feel more comfortable knowing one of our Autotechs has personally had the time to see the product you're wanting installed, and the connections behind the radio, before providing any estimates.