Welcome to the forum, Matt.
Technically, you cannot. You can export the file as STEP and open it in Creo 2.0 but I know that is not what you are after. There is a utility called Granite that can do this but the file will be compromised from the original parametric point of view.
If there is a critical need, you might ask customer support to give you a hand on this. But in general, you cannot do this if you want all your features transferred intact.