Are Wizards capable of Were-form magic without breaking the Laws? I think you'd be able to without breaking the Laws of Magic because it is yourself and not someone else.

According to http://www.dresdenfilesrpg.com/news/archives/2007/06/post.php (bottom of the page), you're right.  Though I would imagine that from a fluff/RP point of view, it would be awkward(but very fun) to play a shapeshifter.  Depending on the variety(i.e. just shifting forms vs. using the mental aspect as well), it could go from someone who constantly needs to make an active effort to remember how to do physical motions in a certain form, such as their natural human form just because they have to keep some many ways of 'piloting' in their heads to some advanced and entertaining case of multiple-personality disorder where, having the hunter-spirit or mentality of animals that typically hunt each other, all sorts of internal struggle ensue that goes to destroy one's psyche. (Which, as an aside, would make for some pretty nifty story-plots.  Especially if some of them were imbued by the shapeshifter in order to keep other hunter-spirits in check...)

Then again, I suppose one can play a perfectly mentally stable and well-disciplined shapeshifter(i.e. the immortal shapeshifting guru mentioned in the books), though I would imagine that to represent the mental discipline and training required, other aspects of the character would suffer. (Though this is from someone who knows nothing about the FATE system at all).