Auto move thread after reply

[powerbook]

I've searched but couldn't find anything suitable. I've found this one but it only moves CLOSED threads which wouldn't work https://vborg.vbsupport.ru/showthread.php?t=132462.

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Is there a hack, mod or cron job that make it possible for a thread to move automatically from one forum to another only once the first reply have been posted in that thread?

I have a situation where RSS feeds into a specific forum but we have to manually move the threads to a child forum once members reply to a thread. If we don't move the replied thread from the member it just dissapear between all the feeds. This way we ensure that once the first member replies to a specific thread it will be moved.

It wouldn't matter if this can only happen on timed intervals like a cron job but just to know that it will move.

Thanks