add a way to encrypt a single large file across a set of images.

obviously the size of the hidden file is pretty limited as is. this means a use wit ba large file would have to come up with their own way (multipart rar or zip probably) to break apart the file, then they have to carefully secret each part into a separate image, and then they have to remember the order of the images so they can reconstruct the original file.
It seems like it would be very nice to allow the user to select a file to hide then add images as needed to hide that file. Then when unhiding, they just need to grab all the images and the software would be able to extract the data then determine the order and put it all back.