retrieve files overwritten on cd?

[Rmoore]

Sorry if this has been covered. I searched but couldn't find anything on it.
System- Windows XP home edition Service pack 3
I was saving some pictures to a CD and inadvertently copied new pics to the CD with the same file names as pics that were already there. (When windows asks you twice whenever you want to do something, why don't they ask you twice when you use the same file name?) Now I can't access the original pics which were erased from the camera. Is there any way to retrieve the originals?

[patio]

Nope.
Gone.

[Aegis]

Come on, Patio, let 'im down easy!   

It is unfortunate but true that due to the nature of the magnetic media of existing hard drives, there are many examples (in both real world and fiction) of being able to retrieve data from hard drives.  Due to the medium of the laser inscribed data of a CD / optical drive, there is no way to retrieve old data once it has been overwritten by new data.

[patio]

But it's not magnetic media...it wasn't clear if they were overwritten on a CD and/or they were overwritten on the camera's flash media as he stated both...
That's why i let him down easy.

If it was a HDD at least he'd have a small prayer.