lyrics / custom tags for wps?

[HiRsch]

hi there,
i want my wps to check the currently playing file for lyrics.
the lyrics are embedded in the "lyrics" or the "unsynced lyrics" tag.
unfortunatley i do not know of a way to display or check for custom tags in mp3 files besides the one that are in the manual.
right now i am adding 'lyrics' to the "comment" tag of my files, and have the wps check the comment tag.

does anyone know if it is even possible to check for custom tags?

cheers guys