From the ReadMe file:
Rawdump Wii Disc Dumper
A method has been found for dumping Wii game discs via PC. Unfortunately, the process takes approximately 50+ hours to dump an entire disc! You will need: An LG-8164b or LG-8163b DVD-ROM (or possibly even other Hitachi) drive, DVDInfo Pro (http://www.dvdinfopro.com/) and .NET Framework 2.0 installed on your PC. Remember, this process takes over two full days to dump a single disc so be patient if you plan to try it!
Install .NET framework 2.0
Adjust dump.bat to match your dvd driveletter
Have DVDInfo Pro running in the background and use a LG-8164b or LG-8163b or LG-8162b dvd drive. It might even work with all Hitachi drives or other brands, just try.
Copy unscrambler.exe and plscsi.exe to the rawdump directory.
Unscramble the .wod file after ripping the image.
This version lets you continue a dump after you have stopped an unfinished job and it also checks if DVDInfo Pro is doing it's job.
Patched unscrambler.exe and no need to modify dump.bat
Rawdump3: Another new version with some minor bug fixes: Unscrambler started when application was closed and Buttons were clickable when checking image.
Rawdump2: This version lets you continue a dump after you have stopped an unfinished job and it also checks if dvdinfo is doing it's job.
Rawdump: Initial Release