Does the crash occur when exporting from Max or when you're playing with PVRShaman? If the crash is when you're exporting from Max, would it be possible for you to send your scene and a screenshot of your export options to devtech@imgtec.com. If the crash is with PVRShaman, could you send your .pod file to the same address with instructions on how to reproduce it.
At the moment there aren't any plans to export a default .pfx but we'll consider it for a future release.