Hello and welcome to the FTA Receiver Support forum here at SateliteHome!
The best way to update your satellite list for North American use is to generate a fresh satellites.xml file from
http://www.satellites-xml.eu This way, you are able to select only the satellites you are interested in receiving such as Galaxy 19 which will include the latest transponder information.
Once generated, save the file to your local hard disk and install it on your Dreambox satellite receiver using software such as Dreamboxedit available at
http://sourceforge.net/projects/dreamboxedit After the new list is transferred, rebooting your receiver should allow your new satellite list to take effect.
FYI, the DFH service for Turkish channels on 97W is one of the few services which don't put restrictions on the receiver you are using for their service. In the past, I had some customers use AzBox and Openbox receivers with their subscribed Irdeto smartcard without any issues.
Good luck!