http://pastebin.com/v602h3Hawp2pgmail-validate.js
Lines 35 and 36 need to be edited by you, depending on how your form is set up.
These are from the "name" properties of the input tags. An easy way to find this is, using Chrome, right click the text field, then select "Inspect element". This will bring up a parsed source code view, and will highlight the line with the input tag. Look for name="wp2pgpmail-asdf-1234".
The order does not matter, and if there are any other fields that need to be kept from becoming part of the encrypted message, add the names there as well.
Also, I'm not sure if you've done this already, but to have the "reply-to" in the email be set correctly so that you can just hit your Reply button, edit your form, then under Form Settings, and under Email, set the "User's Name" field to the name field in your form, and the "User's Email" field as well. Make sure that both fields are set to "required" and that the email field has validation set to "Email".
I believe that this covers everything. If not, please feel free to pester me again.
166XA8Kq3Dv4DVS6vnvzRotpmJovycWd7w