InstallShield installer archive
InstallShield installer archive is what we're calling the format of the
_INST32I.EX_ file included in many Windows software distributions that use the InstallShield installation software. It appears to be a general-purpose compressed archive format, though it's not clear whether it has been used in any other way.
Based on unconfirmed information, the 16-bit SETUP.EXE program detects the user's platform, and extracts the appropriate platform-specific installer programs from
Files begin with bytes
2a ab 79 d8.
At offset 8 is the message "
Copyright (c) 1990-1995 Stirling Technologies, Inc. All Rights Reserve".
- FILExt page about the ??_ file extension pattern (Look for "InstallShield")