If you do not want to hear "Route Recalculation", but want to retain the vocal directions the following has worked for the past few days without any negative affects on anything else:

1. unzip the zipped voice file you use, in ALP2/IGO/Content/VOICE
   
2. Open the ‘info.ini’ file
   
3. Find the entry:
    
   recalulate="Route recalculation." [THE BAD SPELLING IS HOW IT IS]
    
   and replace with:
    
   ;recalulate="Route recalculation."
   "recalulate=""
   
4. Re-zip the entire voice file and copy to ALP2/IGO/Content/VOICE