There is one other step needed to make this work if your using the hack. There is a CFIF statement in blog.cfc that checks if moderation is turned on or not before displaying a comment. It does not matter if a specific comment is moderated or not, if moderation is not turned on, then the code I mentioned in the last post will just not work. The comment will be saved in the DB as being moderated, but it will still show on the site.
If your using the hack, all you have to do is remove the CFIF tag on lines 1074, 1357, and 1489. Leave the content of the CFIF alone, just remove the tags. Once this is done, moderation will be performed on a per comment basis. If a comment is set to be moderated, it will not be shown. If a comment is posted with an url, it will automatically be moderated. Otherwise, comments will be posted as unmoderated and shown. Basically a "mixed moderation mode".
When the code is done for real, these lines should be modified to check if either moderation is on OR if moderationforurlposts is on (or whatever you call the variable).