You can use any version image for any particular model of TiVo. There are two rules that you MUST follow: 1. The image must match the make and model of your TiVo. (Differences in hard drive size excepted. IE, you can use a HDR112 image on a HDR212.) 2. The image must be the same version, or higher, as the version that shipped from the factory on your TiVo. To prevent putting too much load on the TiVo servers, it is best to restore the most recent available image.