WinLAMP.4.0.0.exe
This file is 61MB, and contains all three packages (A+M+P). It defaults to installing Apache in a root directory, with PHP as a module. It optionally installs MySQL. It also optionally installs phpMyAdmin, Perl, and SQLYog. It also optionally installs documentation for Apache, MySQL, PHP, and phpMyAdmin.

WinLAMP.4.0.0-mini.exe
This file is 11MB, and contains only Apache and PHP. It contains their full default installations. Useful if you already have MySQL installed and running.

WinLAMP.4.0.0-developer.zip
This is the developer toolkit: the NSIS installer scripts and directories used to create WinLAMP. Fairly well documented. If you are serious about improving this code, visit the sourceforge pages for this project; contact the administrator.