Naming the post-install script

Post-install script files can be named anything one desires, but the class within the file must be the same name as the file with all path separators replaced by underscores plus "_postinstall". In other words, this postinstall script:

Path/To/Script.php

must contain a class named Path_To_Script_postinstall Due to casing differences between operating systems, it is recommended to always use lowercased file names.