How to use LG GD570 dLite phone Ad Hoc Playlist

(I couldn't find this useful feature explained in the LG GD570 manual or in google.)

How to use the LG dLite Ad Hoc playlist. The Ad Hoc playlist allows you to easily add tracks to the builtin Ad Hoc playlist. From a MP3 music track listing screen, highlight to select the desired track, press down OK button for about 2 seconds, and the track is added to Ad Hoc playlist. (Note, does not work from the music player screen.)