Normally if you want to transfer to a different editing package, you need to export the EDL - Edit Decision List. This should work in theory in any package for the basic stuff, any thing that is specific to one programme may not translate.
Are you wanting to redo in FCP the second time, having originally done the edit in FCE, it's not that clear?
Or are you simply wanting to restart project with correct aspect ratio and import the first edit and only keep the EDL?
Sorry, I misunderstood:
In short, yes I want to keep the EDL in a restart project with the correct aspect ratio.