How to upload a craft with a photoshopped image as thumbnail

@STAP Ok heres how I do it: Take the picture you want to photoshop, go into the simplerockets photo album and save it to your device's camera roll, from there most photoshop apps let you edit photos from your camera roll, edit it, then when you are done dont save it to your camera roll, export it to the files app under "my iphone" > simplerockets2 > game files > photos > images (At least i think. That might not all be right) make sure the photo is in PNG format. Once it has been exported, go into the files app yourself, find the images folder, find the picture you took in game earlier, click rename, copy its current name and then change it by one letter or something (because two images cant have the same name). Now in that same folder, find the photoshopped one you wish to upload, click rename, paste the name of the original photo here, and do as you wish with the original. Now all you have to do is the same thing as if you were uploading a regular image. NOTE: if you didnt change the photo under the thumbnails folder as well, then when you are viewing your pictures in simple rockets, you will have to tap the image to see the changes.
Let me know if you have any trouble.