Hi Gary,
I sort of do that too at times, when I am stuck for a song to learn. I just start going through my styles, but I have got to know the song first to relate it to the style. Then there are times, I recognized that style but I have no idea what the lyrics are or the name of the song.
I tend to stay away from using the Intro #3 on the Yamaha styles, as they are generally set up for a specific song. I think it sounds really incorrect using it because the listener is expecting the song that the intro belongs to. I hear intros #3 that sound familiar but not well enough to know what song it is supposed to be, that is why I like having the Music Finder with over 1000 suggestions offered with the keyboards.
Regards
Drake