The GUI has been finished. All of the options from the original release are there and nothing extra.
I used Samir Vaidya's UI from OpenStego heavily(https://sourceforge.net/projects/openstego), as I am pretty new to both programming and UI. Thanks.
School is about to start back up, so I won't be able to work on it much. I want to add multiple images (splitting up data and storing it in different thumbnails). I believe I may need to put header data into it so that I can tell which parts are which.
I started today on the GUI and it's almost done. It may be finished tonight...
I posted the original source a few days ago. Command line is annoying (mainly because of file locations etc...), so my next step is GUI. I'll probably look at OpenStego for inspiration, it's a very clean GUI.