Hmmm, thanks for pointing this out to me. It looks like one of the mods changed things on the OP. Going all the way back to the first version of the walkthrough there was a link on the OP that took you to the post I created with the first walktheough. I have been maintaining that post ever since so the link would always be up to date. Looks like someone decided to attach the actual file on the OP instead. Here is the link to the original walkthrough post that is up to date.
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I'll plead with the mods to go back to the old way which allowed users to get the new walkthrough as soon as it was complete.