on my d1... got a burnt copy disc of the CNDV-60M ... how do i open the hidden slot and put in the new disc?

I don't know if you're joking or not, but in case you're serious...

Are you talking about the second slot on the bottom?

If so just hold down the eject button. Don't let go after it gets to your normal CD slot, keep holding it and it will open up to the 'hidden' one as well...