Thank you for finding that for me! It worked. In case anyone else needs it here, the procedure is:

go to the Harmony set up page (at the web based set-up page...NOT the
software set-up. Go to http://members.harmonyremote.com/ and login.

On the Device side of the page, click "more options" under the receiver you
want to control, change to remote code to match.

Choose Learn Infrared, select "Custom" and then learn all commands in "raw" form.

It will then DL a small program to allow you to point at the bottom of the
Harmony with your DTVPal remote. Go through all the commands with the old remote pointed at the Harmony. It will then recognize that you have a new remote. On the same web page, look for prompts like "Next" at the bottom of the page (I almost missed these) and then click update remote. This was all on the web page and I never found this exact thing in the downloaded original Logitech software.