I changed some code for google-sitemap.php to work with one of my phpbb3 sites that doesn’t put phpbb3 in the root of the website, although this will work universally if you properly define $domain_root and $phpbb_root_path variables, respectively. This php script was originally done by Tobi Schäfer at http://code.google.com/u/tobi.schaefer/…
Here is the changelog:
/**
*
* @version V0.1.1-S – By Stephen http://blogmynog.com
* @2008-07-22 20:38:18 – * Modified code for use if phpbb3 directory is not in root of website
* * Fixed XML Sitemap validation for Sitemap 0.9
* (please refer to https://www.google.com/webmasters/tools/docs/en/protocol.html#sitemapValidation)
*/
You can get the code here -> Phpbb3 Google Sitemap Generator. This is quick and dirty if you are looking for something more in-depth I would recommend PhpBB SEO.