Ack! I have a vague memory as to why Python 2.6.6 is needed for Blender 2.49b and PyPRP 1.6.1. But I just can't get my finger on it! Is there any reason I can't install and use the latest builds of Python, PyYAML and PIL, including Python 2.7.8?
Thank you for refreshing my memory!
Mod Note: Removed redundant font size