In order to create a copy of your DVD to another disk, you need to copy the data from your DVD to your computer. Open InstaBurner program, and click Copy Disk button on its interface. Insert your DVD into your DVD/CD-ROM and start the copy process. After the process is ready, depending on what files you have, select Data Disk or Video Disk. Drag and drop the files and hit Burn. If you cannot get used to the program, you can try Nero.
