those are sort of false sizes. that is the total size of the rar archives for each one. The reason they compress so well is that the audio is PCM (PCM audio compresses really well in zip and rar archives).

The DL version is around 7GB, while the SL disc is around 4.3GB after it is unpacked. So, you will need a DVD+R DL disc for the DL version, or a SL DVD for the SL version.

Let me know if you have any other questions or comments on the project :) this was one of my favorites to work on!