[mikedomi]

THE BOOKID ARE LINKED TO THE SONGS MDB
SO WHEN you delete a disc from the hard drive you
must always delete the songs mdb and the back up songs mdb
then rebuild you songs mdb and you will then have the book id free to use again

now if you are just doing one track from a cdg then you dont have to rebuild
if it is the same disc and you are putting it in the same place
put the disc in and pick that track in will write over the old track
hope that helps