I have similar problem. In F000 it crashed if I used the pulldown list. If I opened from disk it was ok. In M010 I get into the assemble mode but can't choose any references.
In Reply to Brad Mozley:
I’m having a problem with sheet metal in Creo 1.0 . Is there anyone having a problem with bringing in a punch form part into the sheet metal part. I create a simple flat sheet. Then create a punch form and bring it into the flat sheet and create a punch form. Soon as I pick the punch form from the list and click open, Creo crashes.