In 10.5.x, you should be able to alter the /etc/paths file.
But I have not had time yet to see if OS and/or Security updates will
change those settings back to default.
On a simpler note - can't you just add "export" commands to the
beginnings of your scripts?
Jeffrey Compton
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Apple Certified Systems Administrator
Apple Certified Technician, Xsan for Pro Video
Qlogic Certified Technical Professional