The mod, also known as "Dodo Flight 2.0," aims to restore the beta version of the Dead Dodo route, but not only that. It also includes fixes to the Portland area, particularly Chinatown.
Installation: just move the "Beta Dead-Dodo Flight + Fix" folder to the mod loader, or you can also move the data folder to the game after making backups.
Works in the original version, as well as in Updated Classic, Classic Edition and Re:LCS.