If I use cdplayer pointing to /dev/rcd0d (which according to the source
   for cdplayer should be right for NetBSD) I get an error saying : 
   cdplayer: Bad file descriptor

/dev/rcd0d is *ONLY* applicable to NetBSD/i386, and all ther netbsd
ports will want /dev/rcd0c...
   
   If I try /dev/rcd0c I get (after a little wait) an error message on the
   console saying:

   [ .. error deleted .. ]


sorry, don't know about this one.  can you read data cdroms?