Installation Instruction (extract from README file):

Just copy all files to a subdirectory of your web site (say "/explorer").
Then, you have to edit the config.inc.php file :
the $relativepath is the path from the phpwebexplorer installation directory to the root directory of your site. Say if you wish to install phpwebexplorer in the /admin/explorer sub directory of your site, $relativepath must be set to "../.." $httproot is the root of your web site.

Important: Don't forget to change login and password in index.php file,
default is: root and rootpass