ha, it's funny that i never thought to suggest trying that because i do this process many times whenever i am releasing a library. i often make duplicate versions with different settings or whatever. and i always use nat which is awesome because it's so much faster than using nebula would be. sometimes i'm making dupes of dozens of programs at a time. i guess i'm just so used to doing it that the actual steps aren't specific in my mind.
anyway i'm glad you figured it out, it'd be a nightmare doing them one at a time in nebula.