To achieve a customized setup for new projects in Spine, you can create a template project that includes your desired skeleton name, events, and any other settings. You can then duplicate this template project whenever you need to start a new project. This approach allows you to have a consistent starting point with your specific requirements, such as a capitalized skeleton name and predefined events like "callback" and "sound". While Spine does not currently support customizing the "New Project" feature directly through settings or a seed file, using a template project is an effective workaround.