I figured it out. Surprisingly, it cannot be accomplished within BigBox, but can be done via Launchbox. Open up Launchbox and navigate to Options or Settings. From there you can locate the image priorities and uncheck everything. In BigBox, select use platform device image. I placed the image file I wanted to display for each system in the appropriate platform images folder. This worked like a charm. In essence, I've been leery with using different themes as I do not want to mess up the 100+ hours I've spent on my configuration. Thus, I've manually installed clear logos, platform images and videos and have a very nice setup all contained within the original theme.