Recently had an issue where scripts launched from IntelliJ did not have my Homebrew installed executables on their path in Snow Leopard. Fixed it with the following:
sudo sh -c 'echo "setenv PATH /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin" >> /etc/launchd.conf'
and restarting. No guarantees for any other machine / OS! YMMV.