I was kinda hoping that the PUFO developers had followed the UFO save file model, but given that the games have their differences and the original format hasn't been 100% decyphered, that was most likely too optomistic of me. Instead it seems the save is just a single file.
Just for the moment, I've attached the save so others can view it. I dunno if it'll be much help in this instance, but a look through the Wiki
might help you out: Regardless, any info you come up with would be a great addition to that database!