One of my clients is asking for a version of our help's TOC in a .txt format. Is there a way to do this in RH9? I haven't been able to find anything that explicitly says how to do this.
Yes there is. Use the Tools > Reports > Table of Contents menu item. The report has various options but you can probably leave most of them alone. The chances are your client only wants the Summary report so select that option in the Report drop down. When the report has been generated, use the Save As button to save the report as a .TXT file.