[ale] How to check files on CDROM?

[Thompson Freeman]

This may be a bit of an oddball question when I get to it.

I just spent an hour backing up my girlfriend's pictures on  
her computer, roughly 5 CD's worth. Since CD's can slowly  
go bad, I got wondering is there a reasonable way to let a  
computer verify each file?  In this case jpegs but make it  
a general case.

Obviously, if I had planned it properly each file could be  
run through a checksum procedure _before_ burning the disk.  
As it is now, I need to open each file individually and  
look at it. This can be automated to a degree, but I still  
need to eyeball each one to verify that the picture is  
complete and still there on the disk. Since there should be  
better than 10,000 pictures, that represents a fair chunk  
of time I'd prefer to use goofing off some other way.

Thanks for any ideas, and I appreciate the use of  
everybody's bandwidth.