I have just added a new POI file to my tt920 called Rest Areas and I also downloaded an alert for this POI. The alert I downloaded is a MPS file. I know how to add a alert on my tt920 to a POI but how do I add the MPS file to the alert files? I looked in the directory for my NA maps and I found no place to add this alert. What am I missing? Does the MP3 need to converted and if yes how do I do that?