RewriteEngine on
RewriteRule index.php - [L]
RewriteRule pprf.php - [L]
RewriteRule themes/* - [L]
RewriteRule ppvm_player.js - [L]
RewriteRule ^(.+?(?=/))/(.*)/?$  index.php?ppub=$1&asset=$2    [L,QSA]
RewriteRule ^(.+?(?=$|\/))$  index.php?ppub=$1    [L,QSA]