I couldn't follow that link? What I've seen in basic options is this:
"Use full friendly URLs - If you enable this option, the links generated by the system will not include "index.php?". However, to enable this, mod_rewrite must be available and an appropriate .htaccess file (or the equivalent for your web server) must be in place."
What does that last bit mean about mod_rewrite available and ht.access file?