Answer
Before making changes, print out what you have in case you make a mistake

To make a DN MARP to your TN:

1. Enter the KEY or DN as if you were adding it for the first time.
2. When you are prompted with the word "MARP", enter "YES"

Here is a MARP Example

Link to this page: http://www.ghtrout.net/rdr/marp.html