Oh, I was thinking of it in a different way. I was just thinking of basing it on the original poster's name. If the currently logged in user is the same as the poster of the file then he/she would be allowed to rename. Actually both methods would be nice to be able to use, and somehow provide a way to enable/disable or modify each option.
Using the method you thought of would allow certain people or groups to always be able to rename if it is their file or not; great for administrators and community groups. The method of allowing original posters rename would restrict renaming to just the person that posted it. That method, I would think, could be eisily enabled or disabled, but I don't know from where. Perhaps from within the template itself (0=off, 1=on)?
Just a thought
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Oh, haha. I just saw that you posted about it...I didn't see your last post. Yup, you got it! That was what I was thinking of.