How to obtain "CheckSumMedia.exe"

Hi

I'm having some trouble creating installation media for BackupExec, as the disks I've created so far always produce a CRC error when attempting to install.

The .CMD file that merges the two downloaded parts of the zip, makes reference to a "checkSumMedia.exe" utility and I've failed to locate it anywhere or even any other reference to it.

Does anybody know where it's available from as I've already got enough coasters!  :)

Thanks
Daz