Tjae det er jo op til dig, du skal have et af de programmer der kan åbne DRF filer
ProgramID                    EXEFile 
Comsrv.MaxDocument   %ProgramFiles%\Autodesk Building Systems 2006\vizr.exe %1 
Comsrv.MaxDocument   %ProgramFiles%\Autodesk Architectural Desktop 2007\VizR.exe 
Comsrv.MaxDocument   %ProgramFiles%\Autodesk Architectural Desktop 2006\vizr.exe 
DrfFile                          %ProgramFiles%\Hummingbird\DM Extensions\PWDDRF.EXE 
mvh klaudi