Re: System() disabled? Need help installing
No. There's no way to enable system() without endangering the entire environment (and there are, unfortunately, people who will deliberately mess up the system for their own purposes, even if it only works for a few minutes or hours -- that's long enough for them to get what they came for). That being said, you can probably figure out what the setup script is doing and replicate most of the actions manually. You can change file and folder permissions through cPanel or an FTP client.
One little problem, though -- 777 is going to result in a 500 error. Files in your public_html (or www) directory have a max permission of 644 and folders max at 755, again for security reasons.
“Beware of bugs in the above code; I have only proved it correct, not tried it.” --Donald Knuth
"It was as if its architects were given a perfectly good hammer and gleefully replied, 'neat! With this hammer, we can build a tool that can pound in nails.'" -- Alex Papadimoulis (on TheDailyWTF.com)