Adding your own character to a RIse scenario

Hi there, add 1 to custom characters.

I've taken a look at Matt's tutorial which is a great Rise hack. I've tested it and it worked fine, this is a bit of a game-changer too as this goes from being a feature I don't want to use to a valuable tool.

My question is can we hack this further? 

In Matt's hack, you create your custom character, take the file names of the prebuilt characters in the scorm, apply them to your lovely custom character, and then put those files in the folder replacing the old images. So, say for example, instead of Rise looking for a .png file, could I create characters as animated .gif and replace them in published scorm? Is there somewhere I can update the scorm code to find the .gif version/files instead of the .png version?