Make sure you have set the playlist location, and programmed the remote buttons for load playlist, prev playlist, next playlist.
Try naming the playlists 1.m3u 2.m3u etc rather than 001.m3u 002.m3u
What do you mean by a 'map playlist'?
A friend of mine has written a program that scans directorys and builds playlists (1 per directory)sorting them and naming them either with the directory name or with a number for the irman plugin. It also outputs a txt file showing all playlists, sorted alphabetically. This is great if you have your mp3 arranged in one directory per album.