It's under 'Misc Parameters'
Fromt he manual: Name – The lower LCD line will display the name of the Program. The PARAM 1 knob selects characters for editing. (The active character blinks.) To change the character, use the PARAM 2 knob, the VALUE knob or the +/YES or - /NO switches.
So to change the name, select the patch you want to rename and follow the above, then save it - done!
EDIT: The manual is stacked to the top of the forum page:
http://forum.davesmithinstruments.com/index.php/topic,23.0.htmlYou can find the Misc Parameters section on page 18.