Usually I am very impressed with the quality and speed of PFTrack's implementation. The more it shocked me to find out that even in the latest version I tested, the Blender export is broken: It does not contain any camera zoom data, i.e. if your shot does not have a fixed focal length you effectivly cannot use Blender to continue your work. This bugged me so much that I circumvented the problem a different way. Instead of directly exporting as a Blender script, I exported the data in PFTrack's Human Readable ASCII format, which contains the wanted camera lens data, and wrote a Blender import script for this format. This works really well and fits even better into Blender, because the steps of loading the script into the Blender text editor and executing it there are replaced by a simple import (if you install the importer in your .blender/scripts folder).
You can find the script in this post on blenderartists.org.