djgpp_installer is an NSIS installer I created to download and install DJGPP 2.03 found at http://www.delorie.com/djgpp.

You can download the binary here and the binary with the source code here.

Here's the changelog.txt:

djgpp_installer changelog

Version 1.3 - 05 Apr 07:

	Fixed user defined start menu folder bug
	Upgraded NSIS to 2.24 (2.25 appears buggy)

Version 1.2 - 19 Oct 06:

	Upgraded Bison to 2.3b
	Upgraded Curses to 2.8b

Version 1.1 - 21 Aug 06:

	Upgraded NSIS to 2.19

Version 1.0 - 23 May 06:

	Initial release

and here's the readme.txt:

djgpp_installer - Version 1.3 - 05 Apr 2007
Copyright (c) 2005-2007 Ross Smith II (http://smithii.com) All Rights Reserved

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djgpp_installer lets you download and install DJGPP, which is
available at http://www.delorie.com/djgpp/.

djgpp_installer also performs the following:

* Adds the following variables to your environment:

  DJGPP=C:\DJGPP

* Appends the following to your user PATH environment variable:

  C:\DJGPP\BIN

djgpp_installer looks in the directory where djgpp_installer.exe is for 
any files it needs before attempting to download them. If it does download a 
file, it will attempt to save a copy of the file in this same directory.

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Usage: djgpp_installer [options]

Options:
/S         Install the application silently with the default options selected
/D=path    Install into the directory 'path' 
           (default is C:\DJGPP)
/INSTYPE n Where n is a number between 0 and 4:
           0: Binaries (Default)
           1: Source
           2: Extra Documentation Formats
           3: All
           4: None

/RETRIES n Number of times to retry each download before reporing failure
           (default: 5) (NOT YET IMPLEMENTED)
/PROXY     Set proxy settings (NOT YET IMPLEMENTED)
/ALLUSERS  Install icons for all users (NOT YET IMPLEMENTED)
           This is the default if the user is an administrator
/USER      Install icons for the current user only (NOT YET IMPLEMENTED)
           This is the default if the user is not an administrator
/VERSION   Show the version and quit (NOT YET IMPLEMENTED)
/?         Show this help message and quit (NOT YET IMPLEMENTED)