WOW, Frank, I had NO idea that you had
already done XG drum wavetables with so
many soundfonts!
It is also very good news that SynerGIGs is working on a full XG soundfont.

No,I was not implying sampling Yamaha keyboards from scratch, but instead,just using quality sounds that play properly to the Yamaha protocol.
Since you want the highest quality sounds and quality samples already exist,it's just a matter of converting instrument banks with the proper note mapping(I know it's a lot of work). Using BANKS is the key, although I'm sure you will still have to juggle instruments for proper drum mapping. There is also a great program(you probably already know of) called AWAVE for bank and sample conversion,which may be of help to you.
I have never heard of a "Soundfont edition of Sound Canvas".
Roland has some of the best drumkits I've
ever heard - have you found any that you feel are better?

I will try the factory reset for Live-Styler,
and if that doesn't work, I'll do a complete
deinstall/reinstall.

Thanks for the help.