Without trying it myself I can't say for sure what tweaking might need to be done but what I'm thinking might be where the files are in the directory structure. It might work without a problem but it might not.

The file name when you export it from the Repository should be named content.Repository.Repository.xml and needs to still have that name when you import it and you can put it in any directory under the Portal Root. Why you are probably not seeing it is that a resync needs to be done in the File Manager. Go to Admin->File Manager and click on Synchronize Files (you may also need to check the Recursive check box. You could also upload the file in through the File Manager and I believe you wouldn't have to go through the file sync in that case.

The same menu where you clicked to set the settings for the module. It's usually an arrow (or upside down triangle) along the modules container title. If you don't see it then make sure your site is in Edit mode and not View mode.