There has been some work on the genesis coupe for custom media software and custom navigation software. It involves updating from USB, once the command executes it looks for a file called install.exe. The file is actually the windows CE explorer.exe but renamed. Of course this is the extremely simplified version of what happens.
I have tried to do a USB update like the genesis coupe but it didn't work in my 2009 tech. I am running HU version 19.00, the latest version is 21.00 I think. Perhaps an update to the headunit allowed for USB updating. Read the g e n c o u p e.com thread for more info.
http://www.g e n c o u p e.com/electrical-wiring-2008-2012/52643-stock-nav-hack-16.html
*******One of the problems I'm having with this forum is the auto correct feature. When I type G E N C O U P E.com it is displayed and linked to genesiscoupe.com. In the above hyperlink remove the spaces to get to the correct forum OR you can google search "genesis coupe nav hack" it should be the first link that comes up.