I'm looking for a search engine for a text-oriented CD I want to publish

I publish a newsletter for Louisiana lawyers and have over five years 
of past issues that I would like to put on a CD and sell.

The newsletters are in WordPerfect format and there are about 40
files 
(one for each issue) that total about 10 mb that I want to include in 
the CD. 

I am looking for a search engine that non-techie lawyers can use to 
search the past issues. I will probably be selling the CD compilation 
for between $99 and $135, so the engine can not be too expensive. I 
have looked at Acrobat, but the interface is not great if I want to 
search over 40 files.

Has anyone had any experience (good or bad) with document search 
engines for CDs? Does anyone have any recommendation, comments, or 
suggestions?






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There is a read/write Web page with resources that will be linked there and used during the Seminar on PDFs for lawyers and legal applications:

http://Network-Lawyers.org/PDFLinks

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