I did not know about this project, however, I will still do development on this project as I would still like to learn GTK, and who knows, maybe even add in some features that are not included in Xpenguins.
Unfortunately, that is how it works right now. In the future, I don't want that to be how it works. I will probably have it make a file in /home/username/.ponies that contains a path to where the gif files are located. But for now, the path has to be hard coded in until I create dynamic loading of file paths to the gifs.
It will probably be a command line parameter, and if it starts with a "/", then it will write to the .ponies file and change the default location for gifs, then look at that location for gifs until you change it again.
This will probably be the next thing I add, but I won't have time for a few days to add it in.