1. Upload your forum system. If you don't know where to upload from, find the first index.php (or index.html, etc.), and select all. Then upload it to /public_html/. Please do not confuse the folder where the index file is contained and the contents of that folder. You need to upload the contents of the folder. Is this clear? Example:
+phpBB (upload what's in this directory)
-+adm
-+cache
-+docs
-+...
-common.php
-config.php
-...
2. Go to your website. It should be on the installation screen. If it is not, then type in your URL, and a "/install" or "/setup", whichever is the install directory. If that still doesn't work, then "/install/install.php", "/install/setup.php", "/setup/install.php", "/setup/setup.php", or whatever the install file is.
3. Are the MySQL/PgSQL databases set up correctly? Use "localhost" for the server.
4. Is your x10Hosting PHP Configuration correct? You should use Intermediate PHP Configuration.
5. After installing, go to your website, and voila! Your new forum!