I just used this and it works well. Very easy to do. BTW, the url that couts there, is valid. But just incase that topic it doesn't become valid here it is:
Ahh...I see what drknght is pointing out. If someone were to copy the code and paste it exactly as it's now you will get a double post per user. The original code only has the "$AuthorExtra" and "$ip_wording" but doesn't include "$post_body" whereas the replacement code contains all 3 variables.
The replacement code shouldn't include the "$post_body" if I'm correct.
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The above worked well for me, and both should work well 
