I had an issue where all of my scripts needed a path to be changed requiring me to open each workgroup and change the path in each script for 40 different workgroups. I found a search and replace agent which works great for this purpose. Just point it at the workgroup and put in "*.qawscript" for the "Filename/Filter" and the text to be replaced in the "Find" testbox with the replacement text in the "Replace" textbox and hit "Replace". It works for almost any type file.
The tool is "Textcrawler 1.1.4". It is free and can be downloaded from http://www.digitalvolcano.co.uk
Enjoy.