Yes, with PT 5.1 (5.1.1 current), from the original session, you can "Save Session Copy In" and change audio file format to WAV.
It would be better to start by creating a New Session from your orignal session. choose WAV as the Audio File format, and choose "enforce Mac/PC compatibility"
* When creating CD's to transfer from Mac to PC's be sure to create an "ISO9660" type of CD.