Blank CDs List
Some CDs do not seem to give you any cards.  I'm not sure if they're cards for some secret monsters or what, but I am not able to get anything from them.  Anyways, here's a list of them all!

Shanghai Great Moments (PC)
Secret Paths Through the Forest (PC)
Encarta 98--Disk 2 (PC)
The San Diego Zoo Presents...The Animals!(Version 1) (PC)
Gabriel Knight: The Beast Within--Disk 3 (PC)
Lunar 2:Eternal Blue--Disk 2 (PSX)