DFI still have the manuals, drivers, etc on their website, its just not straight forward to access. I still had a link to the page in an email and as of writing this, it still works:http://www.dfi.com.tw/DFI-Lanparty/
The above link should provide access to all of the Lanparty drivers, manuals, bios stuff, etc.
Failing that. I still have the European User manual for the 790FX in my google docs. But it is not
as complete as the Full English User Manualhttps://docs.google.com/open?id=0B3eTL-I1FlD6NjJhZGRlMmItZTQxNi00YjYxLWE4MjktZGFlZWI2YjNlZDQx
Hope that helps.