I'll try that but really ackward thing is that 3DMark2005 installation works fine using the same line: REG ADD %KEY%\050 /VE /D "Futuremark 3DMark2003 3.6.0" /f REG ADD %KEY%\050 /V 1 /D "%APPS%\3DMark2003\3DM03.exe -s -f1\"%APPS%\3DMark2003\setup.iss\" -f2\"%LOGS%\3DM03.log\"" /f REG ADD %KEY%\050 /V 2 /D "REGEDIT /S %APPS%\3DMark2003\3DM03.reg" /f REG ADD %KEY%\055 /VE /D "Futuremark 3DMark2005 1.2.0" /f REG ADD %KEY%\055 /V 1 /D "%APPS%\3DMark2005\3DM05.exe -s -f1\"%APPS%\3DMark2005\setup.iss\" -f2\"%LOGS%\3DM05.log\"" /f REG ADD %KEY%\055 /V 2 /D "REGEDIT /S %APPS%\3DMark2005\3DM05.reg" /f Yup, generated running the installshield .exe with -r