I work work with a client who has everything in CoCreate 13. I also use the free Elements 4.
Know that the PK2 is not compatible with released versions of CoCreate and from what I can tell, will not open in Creo 2.0 either. This is the feature that makes it an eval app.
As for opening Pkg and bundle files in Creo 2.0, it works fine as long as you remember to install the -optional- interlink module, which seems silly to me where this is not installed by default.
The files do open with and they do have a special link to the original format. The link is easy to break if you choose to but interoperability has been considered.
Since all my files are client files, I cannot share them. For the most part, just consider them as imported models with some special hooks.
You cannot open session files and drawing compatibility (.mi)is absolutely horrid. The idea is that the flexibility in Creo Elements Direct (CoCreate) will easily let you re-associate your drawing to any parametric modeler changes you made. With the compatibility links between the two platforms, this should also hold true if you sustain the drawings in Creo 2.0.
If you have a more specific working relation you would like to discuss, please explain the scenario you are considering with the two platforms.
