Here's how I finally removed the menus:
1. Removed the PDFMakerLib file from /Microsoft Office X folder.
2. Removed the PDFMaker files from the /Microsoft Office X/Office/Startup/Word, Excel, & Powerpoint folders (one file in each).
3. Launched Acrobat 6.0. Got a Dialogue Box asking me if I wanted to Repair PDFMakerLib.
Here's the key sequence:
a. I unchecked PDFMakerLib.
b. I then clicked CONTINUE (not Cancel).
Acrobat then launched, and when I subsequently launched Word, Excel, and Powerpoint, the menus were gone. When I tried any other combination (checking PDFMaker Lib and/or clicking Cancel), Acrobat recreated the files.
I tried Control-Clicking Word Menu bar. It does the same thing as just clicking on the close button. It takes the menu away for the session, but if I shut down Word, and then open it again, the menu is back. Same for PPt and Excel.
Thanks for all your help with this.