You could also use Adobe Acrobat Writer. When you 'Print' the scripts using the Adobe Acrobat Writer, you can then open the PDF file and perform text searches within the PDFs.
Depending on your budget, there is a developer tool called 'analyzer' from waves-in-motion. I have not seen it work, but read reviews of it. Basically it exports your scripts, field definations and relationships into a text file. It can also print reports that describe what fields are used in what scripts, etc.
You can find it at
http://wmotion.com/developer.html