Its OK to error out on a missing tdb file as that is not optional, but
you should probably detect the presence of a mdr file though and
adjust omit it from the file. I'll have to add the ability to detect
MDR files to FileInfo.

You should also take account of the product-id too.

I will commit the patch, thanks!

I will definitely improve the patch based on your suggestion and other people's as well.

Thanks,

N.