• Start Guitar Pro 5.2.  In the top menu bar, click on  Import then select MIDI.  Now select the "AuClair.mid" file or or some other Midi file and import it into Guitar Pro.

•  Look at the "Ch Ch2" columns.  Delete or be sure to rechannelize any device/tracks that use channels 11-16, such as, voice/vocal tracks.  Channels 11-16 are reserved for Rocksmith 2014 songs.  Note: Drums are always on Channel 10. 

• (not optional) It is strongly recommend that you include a basic two bar drum track with the MIDI song for count in, if it already doesn't contain some kind of count in.  This will give you time to get ready to start playing.  Position the song indicator at the very beginning of the song.  Clicking on the rewind button is one way to get to the beginning of a song.  Click on the top menu item "Bar", and select "Insert a bar" from the drop down menu or just press the shortcut, "Ctrl+Ins" twice to add two new bars to the song.   Next, on the menu bar click "Track" and select "Add" (or use the shortcut Shift-Ctrl-Ins), a pop up window "Select your Instrument" will open.  Under "Group", select and highlight "Drums and Precussions".  Click "Add".  The new "Drumkit" track will be added.  Select and open the "Drumkit" track.  Click on the rewind button to move to the very beginning of the song.  Next will will add some drum beats to the two empty bars. 
  

1. Press the number one "1" key to add a new drum note to the track. 
   
2. Next press the right arrow key to move to the next beat.  Add another beat, this time press number "7".  Another drum note will be added.  Repeat this step until the current bar is filled with drum notes.  Repeat step 1, when the cursor moves to the next bar.  Stop when done adding drum notes to the first two bars.

• Select a guitar track you want to convert to Rocksmith 2014.  Press Ctrl-A to "select all" and highlight all the notes from this track, then Press Ctrl-C to "copy" only the current track.

Note:  To determine which MIDI track to make Rocksmith Ready, I usually mute all MIDI tracks in GP and then listen to each track one at a time.  A track that just contains individual notes is the best choice to convert to a RRM.

• Create a new empty track.  Press Shift-Ctrl-Ins and insert the new track after last track.

•  The following Track Properties dialog will open.

• You must use one of the following track names to describe the new Rocksmith 2014 track; "RS-Lead",  "RS-Rhythm", or "RS-Bass" so that the track will be recognized by the Midi2RsXml converter program.  Check the flag "Force Channels 11 to 16"

• Click OK

• Paste everything into the new empty track.  You should have 2 identical tracks, the original track will be used to play the MIDI notes, and the duplicate "RS-????" track can be converted to Rocksmith 2014 CDLC.

• Export and Save the file to MIDI format.  The MIDI is now Rocksmith Ready.
  

Thanks to Francesco Grassi for posting the original method long before anyone else.