Dumps of the hard drive pretty much just have a system partition with the firmware's nk.bin, eboot.bin, and recovery.bin, as well as a few databases and configuration files. In addition, there is another partition for things such as media files and games.
The firmware itself can be dumped. If you have experience reverse-engineering firmware, you should know how to do it.
What do you expect to accomplish by getting the Zune to crash?

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