Wow, that's such an old post Thanks for pointing us to that page.
Please note that this version of the WordPress installer (3.2.1-0) was published in July 2011.
I'm afraid that this very old version is not available for download, but in any case, I would encourage not to use that version, as it would surely incur in multiple security issues that have been fixed since it was released.
You can use the latest version of the Bitnami WordPress Stack installer, which can be downloaded from here. The installer will automatically detect if the default ports are in use or not, and offer to choose a different one in that case. If you want to force using a different port, you would need to launch the installer from command line providing the following parameters:
--apache_server_port <apache_server_port> Apache Web Server Port
Default: 80 or 8080 - depending on your permissions
--apache_server_ssl_port <apache_server_ssl_port> SSL Port
Default: 443 or 8443 - depending on your permissions
Would that work for you?