I have a large number of files in application.
To reduce number of installation disks I zip most of them to a single
archieve before creating distribuion disks.

I create distribution disks using VFP 5.0a setup wizard.
For post-setup executable I specify the pif file to unzip my
application.

This pif file contains the following command:

somedir\unzip.exe -o eeva

Under windows 95 setup works.
Under Windows NT I got a message after setup:

Setup was not completed successfully

and I must manually execute the pif file for unpacking.

Why this will not work in Windows NT ??