I've an opel corsa (Europe) with the factory radio unit without aux port... Can I find an adapter or must I use an FM modulator like this: http://cgi.ebay.com/DIGITAL-STEREO-F...QQcmdZViewItemhttp://cgi.ebay.com/DIGITAL-STEREO-F...QQcmdZViewItem

to play my carpc sound in the car boxes?

sorry for my poor English.