Well, I've provided working checksums, and you can verify your process against mine, and if you still can't get it working, then my assertion that the decompression is the problem - not the provided file.
I'm not on the side of the vendor here - the software support is obviously very bad - but I've had the board all of one day, and I'm providing my insights to the community, as a good citizen does, and you're basically just a troll on the mailing list that seems to have an ax to grind.
If you have stuff to share with the community, by all means, share. You're right - they should be providing hashes, but they didn't, so I did it for you instead. Why are you mad that I'm trying to be helpful?