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I have the MS OS licenses already with my MSDN developer subscription.
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Even if you have got a very particular version of MSDN that covers embedded development and use of the 'Platform Builder' I doubt that this would cover OEM licensed components like drivers and apps written by Sharp for the .NET platform for this device. Remember also that MSDN licenses do not actually give you the right to use the Operating Systems or Applications for 'production' use - only for use whilst you develop products.
I think any 'positive' outcome from your point of view, short of being able to buy and hence relicense the image from Sharp, has some distinctly non-legit overtones and I would discourage you or anyone from posting details about where such an image may be obtained since this is pure Warez talk.
-Andy