PassionTriak, People Putty was used to create various heads including hair, gender, emotions, accessories, glasses, scars, beards, etc. It was just a 3D head as UltraHal did not originally use anything but the head and possibly head & shoulder characters. People Putty was released for use with Zabaware's UltraHal Assistant software. Hal was able to load and animate a 3D head while conversing with the user.
While People Putty did have some Full Body characters, they were not specifically designed nor used for / in the UltraHal program. Some clever users found ways to get them to work in the Hal program. Those full body characters had their own "bones" system that allowed movement. No other 3D character software would / will work other than Haptek's People Putty. It sort of went by the way side after XP.
Your models will not work with UltraHal.