xps wrote:or can i just upload all the seo premod 3.0.4 files and overright my standard 3.0.2 installaton?
If you do not have custom code to keep from you 3.0.2 phpBB, then, you can safely upload all files except config.php and the .htaccess from the premod's archive root/ dir in your forum's root.
Then, you'll need to run install/database_update.php and delete the install/ dir to update your db.
And then, install the phpBB SEO acp (phpbb_seo/phpbb_seo_install.php) and GYM (gym_sitemaps/gym_install.php) and finally run the no duplicate query to be found above in this thread.
To safely do the whole thing, I strongly encourage you to try it on a local server and to backup your db first. And then, to only activate url rewriting once you've chosen the url you want ot use and generated (and tested) you .htaccess. But besides, nothing should go wrong.
If you had many code to keep, you would need to additionnally put it back in the premod's files before you upload them. This can be done pretty easily with software's such as winmerge