Altering just the background on theme?

[NitroTurtle]

So, I’m not sure if this is the correct place to ask but, I’m not sure if I’m doing this right, but I wanted to take an existing theme and edit the background as the current background is module specific. I’d still give credit to the original creator and it’d just be for personal use, but..

What I did was, I took the ext and turned it into a zip file, I dragged the image into the frames folder, then I went into the frames file and changed the background image to the name of the image that I added and also changed the size to match the resolution of the new image. Then I couldn’t for the life of me figure out how to change it back into a .ext, what have I done wrong? Is there a way to do this without changing the file type?

[Zacchaeus]

Select all of the files inside the folder, right click and select send to zip. Rename the resulting file from .zip to .ext. you can also include the entire folder in the extension folder if you want without zipping it and it should still work.