@ s4real,
Not sure if this works, but here is an idea for the user interface in the beginning. This interface allows the user to select their directory where the game is for packaging, select their image, and select their video BEFORE you click on Package Game button. Just gives a rough idea hopefully.
This way it allows everything to be chosen first and then the game is packaged, rather than having to entering the name, package the game, and then the pop-up box coming up to select the image and video. In a nutshell, it takes your process and puts it up front first, then package second.
Cheers
Mike
Edit: Fixed the interface example- replaced Video with Sound.