If you tell us what you actually want to accomplish, we can probably find a workaround. “Install a plugin” is not good information “I want to find a way to monitor my stats/show off my pictures better/get better hits” is a good answer and we can help you find a solution if you can’t find one via searching the forums and support.
Further information. Disabling right click creates a false sense of security. It’s easy to get around.
If they are all your own personal creations then watermark your images (find free watermarking online). If the contents of your posts and pages are also your own original intellectual property then post a copyright notice (creative commons).