I have both the Zen and the Vision M and I use MM to import my playlists onto my player. This is sufficient to meet my needs. However, if you wish to edit the playlists on your player, you can use the Creative Media Explorer, it will make the changes but you will end up with the new playlist and the original playlist on your player, one will be a .pla and the other will be a .m3u. Also, you can use the Export All Playlists
and export the playlists to your hard drive, import them into the Creative Mediasource software and import them to your player that way. I use MM exclusively for all of my importing needs, the only time I use the Creative software is for the imports of my photos and videos. Just make sure when you use MM to import to your player you go to the configuration and setup your playlists to go to the /My Playlists/ folder. Hope this helps.