I was looking to replace the factor radio in my family's Relay (to add iPhone connectivity) and on Crutchfield every radio comes with a warning saying that if replaced the DVD audio will only work through the headphones.

I'm assuming this is correct but if anyone wants to tell me it isn't I would love to hear it. If it is indeed accurate is there any way to modify the OEM radio for AUX input w/o having to run it up to the White and Red inputs for the DVD player?

Thanks in advance either way!