Open iDVD, select iDVD theme and add photos. Use iDVD slide show editor to customize slide show. Set transitions, slide duration and any tunes you want.
In iMovie click Share->Media Browser. Choose the Large setting. Next open iDVD and start a new project. Choose the Movies tab and add the iMovie video that you saved. When you are finished with the project, click burn dvd.
first you should install the latest version of nero or any other burning application software to your computer than you can able to proceed over your requirements such as imovie