:lol:
This sounds like that old Catch-22 - if she drowns she wasn't a witch and if she floats, BURN HER!
i.e. If your CDTV mobo is broken, use the expansion and it won't break the mobo but you won't find out if the expansion works.
OR... if your CDTV mobo isn't broken, then the expansion will break it.
Bah, I'm tired, ignore me