What kind of image is this? I sure hope it is legal If this image is not protected etc, it can be done quite easily..
If this image contains just data (no boot or whatsoever), writing to DVDR is quite easy. There are a few ways to do this:
1. Mount the image with some kind of virtual drive (both Nero and Alchohol come with a virtual drive) and copy all the contents to a DVDR with either one of the burning apps
2. Extract the contents of the image with a tool like IsoBuster and afterwards, write the data to a DVDR disc
If this image contains some kind of bootsector, it gets a little more complicated. With IsoBuster, you can extract the normal data and the boot sector data separately. Afterwards you can write a DVD-ROM (Boot) type with Nero.
Good luck and report back