If you have the Kill-A-Ton or East-Meets-West version(s) of Duke3D v1.5 Atomic. You'll need to use this patch BEFORE installing Eduke v2.023 (Windows installer).

The Kill-A-Ton or East-Meets-West version(s) where packaged differently and there is a problem with the Windows installer failing to recognize these CDs/Installed Game as full US Reg Duke Games.

Must run from within your Duke3D folder.

I think this is similar to the above patch. Allows you to enter the path to your installed game.