im still not 100% sure what your after... but there is a NZB mod at tbdev that i found pretty quickly
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however they will only support official tbdev source code. if your not using an official tbdev source code then you will have to figure this one out on your own if you run into any problems.
but make sure you read the note .. this is for advanced/experienced users only. If you dont know how to debug PHP including a good working knowledge of the PHP language then dont even attempt such a mod