Well the problem is with DFF files is that a company can add custom clumps to them in a way native RenderWare tools can't view them. Your best bet is either compare it to a GTA SA dff file in hex and try to figure it out.
Or hope for the best and try ninja ripper.
ALSO
To make ninja ripper work with dolphin you have to use Direct X 11 mode in both programs.
Or hope for the best and try ninja ripper.
ALSO
To make ninja ripper work with dolphin you have to use Direct X 11 mode in both programs.