Your install was fine when I posted as I ran through your install on step 5 you must specify the correct path to your vbulletin which is
CONFIG-INT.PHP Integration Variables
Server Path to Forum directory
/data/17/2/81/159/2570974/user/2818642/htdocs
See your install here
Main Index - PhotoPost Classifieds
You can delete the install and upgrade scripts from your server.