You upload the Install Directory into the Folder you want to have Fusion on; probably the Main Domain. Then you go to the Install.php file - generally under /install/install.php - from the browser. Then you can install PHPFusion.
A Knight is sworn to Honour. His heart knows only Virtue. His blade defends the helpless. His might upholds the Weak. His word speaks only truth. His wrath undoes the Wicked.