stadium creator is mode that u can create a new stadium. so the the export and import are the way that u can save ur created stadium. that y u need to export if u make the stadium by urself. automatically it will save the created stadium data on ur ps3 drive. the import mode is about data that already have on ur ps3 drive. its mean if ur have delete ur option file (without deleting ur stadium data) u can import the data into ur new option file. or u can copy anyone created stadium data into ur ps3 drive. in edit mode u can also load this by import it. i think this stuff is great, we can share created stadium with friends.