Things You'll Need
Instructions
The first thing that you're going to need to do is install a mod chip in your Wii so that it will recognize and load games that aren't on regular Wii discs. This installation may vary depending upon the specific mod chip that you use, but the mod chip should come with complete instructions on how to install it. Be very careful when installing the chip, though, since a mistake can cause significant damage to your Wii system or might render it unplayable.
Check the format of the file that you want to burn to a DVD for use with your Wii. If the file is in the .iso format then you can move on to the next step, but if it is in a format such as .wii or .wod then you will have to unscramble it first. Use an unscrambler program that can recognize the file format that you're using, making sure that you have it save the unscrambled file as an ISO.
Using the ISO software of your choice, burn the .iso file onto a blank DVD. Use the lowest speed setting available for your DVD burner. Though you should be able to use either a DVD+R or a DVD-R, the specific mod chip you use may only recognize one or the other. The mod chip's documentation should contain notes on any disc limitations such as these, but if you find that one format simply doesn't seem to work make sure that you try the other format before giving up on it.
Once the burn process is complete, your disc should be playable in your modded Wii. Label the disc so that you know what's on it if you like, and then test it out to make sure that it works.