Thanks for your reply.

Well...the disk and music book arrived today, but alas the files were unrecognized by the few sequencers I tried to load them into...tried changing the extension to .mid too.

The original files have the extension .evt
and when opened with notepad are revealed to be in Yamaha's own ESEQ format (compatible with the Clavinova and specific PSR models.

If these could be converted to SMF format somehow, that would be great.

Regards,
Rich