This script will let you append text to the selected notes in Evernote.

EvernoteTitlePrepend.applescript

tell application "System Events"
  
	set the_dialog to display dialog "What would you like to prepend to the selected notes?" default answer ""
	
	set prepend_text to text returned of the_dialog
	
end tell

tell application "Evernote"
	
	set theNotes to get selection
	
	repeat with n in theNotes
		
		set theTitle to title of n
		set title of n to prepend_text & " " & theTitle
		
	end repeat
end tell