It took me a long time to find the resources for the music and textures. Contribute to camila314/TPEditor development by creating an account on GitHub. The icon textures didn't turn out very well (the super mushroom was pretty good though). You can add texture packs to the selected list, like this: And remove texture packs from the selected list, like this: The files in the lowest texture pack are prioritized first, then the texture pack above, and so on.
Although the previews don't have the exact same music and textures as the texture pack has now, because those previews were recorded when I was still creating the texture pack. Now add all your GD texture pack folders into the Texture Packs Folder and click Refresh Texture Packs. After recording a video for this texture pack last night, when I was about to put in a video editor, I realised it had no sound! Luckily I still had a couple of shorter recordings that I made for previews when I was still making the texture pack. I made this texture pack a month ago but since then, I haven't had any time to make a video for it.