Aftermarket double din instead of satnav and HK

Need some advice on fitting an aftermarket double din unit to an e46 with a sat nav unit and harmon kardon sound system.



I've done a few double dins in e46's before so i'm familiar with hacking the air box and making a bracket, however these cars didn't have sat nav units or harmon kardon.



What i need to know is, can this be done? the cabling looks different and and there's no arial.