Sounds like you have been hard at work! Can you post me the details (and maybe a short note for beginners on how you did it) and I will add it to my website. I think you have my email address.
As you probably know, many Casio wk3xxx owners have migrated to the WK-Studio forum at
http://www.originalz.com/casio/casio_bbs/. And in general, they don't seem to check this forum out very much. I suggest you copy your post there are well.
Stephen