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Idecomp

This program lets you extract files from InstallShield 3 archives. These files are usually produced and extracted with Icomp.exe from ICOMP95.zip that can be found on various places across Internet.

It handles archives with .Z suffix and multi-part archives with .1, .2, ... suffixes as well.

InstallShield archive data is compressed with the (now obsolete) PKWare Data Compression Library. This program includes work from Sven Kochmann (https://github.com/Schallaven/pwexplode) with a bit of optimisation.

This software follows PWExplode license and is released under the GNU GPL v3 license.

How to recognize an InstallShield 3 archive

It has a .Z or .1, .2, ... suffix.

Each file has a header which looks like 13 5D 65 8C 01 02 00 in an hexadecimal editor.

Usage

To list files:

idecomp.py -l achive.Z

To extract:

idecomp.py archive.Z

Idecomp supports an optional glob to only extract specific files:

idecomp.py archive.Z *.txt

You can change the encoding of file names stored in archives with the -e switch but the default (Windows-1252) should be fine for US and Western Europe.

By default, when processing multi-part archives, Idecomp only extracts files in the considered part of the archive like the original Icomp.exe. To extract everything, use the -a switch.

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Extractor for InstallShield 3.0

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