Changing name of ISO checksum file

[nodata]

Am Donnerstag, den 05.02.2009, 14:29 -0800 schrieb Jesse Keating:
> On Thu, 2009-02-05 at 23:23 +0100, Till Maas wrote:
> >  Why does this make things harder, given that the .iso files already have 
> > different names, too. 
> 
> It just adds complexity to the code that is generating the sums.

How many times is each file read? Is it once per checksum, or just once
(and then generate all the required checksums)?