Also, regarding my second question the previous plugin had a meta-key on the button that uploaded the files and it returns this:
array ( 0 => array ( 0 => ‘4945’, 1 => ‘4947’, 2 => ‘4949’, 3 => ‘4952’, 4 => ‘4954’, ), )
So, these are the files that were uploaded at a random post. Is it possible to get access to this array from the edit post form of Frontend Admin??