How are you actually capturing them to your computer?
It's probably a better idea not to make sure it works in Media Player and Nero, but more within Pinnacle if that's where you want it to work.

Pinnacle as its own build in capture system. Plug in the camcorder and capture it through Pinnacle. It actually makes some of its own files in addition to the usual .avi files so that it can read them and understand where they are on your computer.
It's an idea, try that.

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