prog to check integrity of cd-r's??

[vexingv]

i dl a lotta stuff and usually wind up burning/archiving on cd-rs....is there a program to check that the files/image burned is accurate to the orginal source and is readable? i know nero already has a "verify write" option, but my cdrw usually stalls when it comes to checking and the feature isnt too detailed either. any suggestions would be great.