I'm getting ready to have my head unit installed. I was going to get some Kingston Data Traveler 4GB 4 pack for a real good price. Just wondering if anyone has this head unit and uses Kingston memory of at least 4GB. Wanna know if it's compatible or not. Below is a list of what's suppose to be compatible. But the Sony memory goes up to 16GB. So wondering why I can't use Kingston 4GB. Thanks. http://esupport.sony.com/US/perl/support-info.pl?template=&info_id=270