On the contrary, the hack page provides the CRC, MD5, and SHA1 for the ISO file. These are called "checksums", and you can calculate the checksum for your .iso file to verify that it is correct.
If you have your ISO in a .zip file, then most archiving programs will provide an option to display the CRC32 for files in the .zip. Otherwise there are many programs for calculating checksums. I like http://blisstonia.com/software/WinMD5/ .
To be clear, you really only need to verify one of the checksums. It is possible for two files to have the same CRC but a different MD5 - but it is very, very, very improbable.
My bad, I now see what I have to do. Thanks for pointing that out.
Unfortunately, the odds weren't in my favor. I opened WinRAR to see that I indeed have the same CRC32, but a different MD5. The one that I pulled is:
Oddly, the page I acquired the ISO from shows the correct CRC, hash and SHA1. It is only when I extract the file that the hash (and, incidentally, the SHA1) for the ISO changes. Would this be a problem stemming from WinRAR unpacking it?
EDIT: I have resolved the problem. It seems the ISO had been compressed using NKit. I simply reverted it back to its original form and everything is in tact. Thanks for your help.