Well, having one Creo 3 installed in our office, I tried to open some Catparts from our clients that include PMI or 3d annotations. But the annotations are missing on Creo..
I searched in layers (maybe they are on a hidden layer), and nothing also. Any specific config line to import PMI or Creo just doesn't handle PMI data from CatParts?
I found an useful article to your Topic:
Do you know which type of PMI Catia is using?