Because you supply the path name of the .SIS file as an argument to the setup command, you must execute the setup command from the Run prompt.
Click Start, click Run, and then type the full path name of the installation setup command followed by the full path name of the .SIS file. For example, if you are installing from a CD-ROM in drive E, type:
E:pcpro3\setup C:\install\setupfile.sis
The installation proceeds according to the contents of the .SIS file.