In order to make Rodi work, you have to install your own DotNetNuke. If you don't have one you can download it on their website and if you don't know how to install it, here's how. Rodi is only developped for DotNetNuke so you must have one to make it work !
Once you have DNN installed, you have to download Rodi here (if it's not already done). Put it in a folder and add all the files from your DNN into the web folder.
After that... you're done! You can now see how to contribute to the project !
To run the project, just launch RODI.sln. If you can't, you should download Visual Studio.