What you want is called a 'silent installation'. The InstallShield Express Help file has some information about how to accomplish this.

>I am readying to create a SETUP program for a VFP 8 application. This SETUP should have only VFP 8 run-time library files. I want the SETUP to run without any user interaction, that is, one-click and all run-time libs are installed. Is InstallSheild Express Limited that comes with VFP 8 is suitable for this task?
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>Thank you.