The command "Curve From File" does not exist in the ribbon menu for Creo 2 Parametric. The commands associated with datum curves are located in the drop down section of the Datum group within the Model tab. Within the Datum group there is a curve fly-out menu for "thru points", "from equation", and "thru xsec". The option for Curve From File should be located here along with the other datum curve options. The default PTC groups cannot be altered to add missing commands, therefore a new group would have to be added to the ribbon to add this command. Creating a new group is easy, however this places the command outside the context of where it should naturally be located.