Looks like the Wayback Machine got a nice capture of the thread you're looking for. It has everything except page 4 of the thread, but the list of deities and such is in the very first post so that shouldn't cause you any problems.

[url=https://web.archive.org/web/20131018005237/http://roleplayerguild.com/showthread.php?70807-Cthulhu-Mythos-and-Lovecraft-Lore-by-Grimm-%28W-I-P-%29]Here's a link to the archived thread.[/url]