Walt, at that stage of the thread the OP had not mentioned were this image file belongs to, it just seemed to be a result from a purchase. From this perspective the topic "How do install spray paint textures? the instructions do not say" together with the info "The instructions to manually install, dont tell you how to install these texture.jpg yeah" can hardly get answered correctly or unambiguously. Since question + topic is literally about "installing", a brush is the right place for a jpg, if not the only one for an image "installation". Note, nearly any image can be meant by a user to be used inside brush ("installed"), it does not have to show a or be named as "texture". 😉