diff --git a/README.md b/README.md
index 9206a22fde..d64395cb17 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,11 @@ If you have a CMake-compatible IDE, it should be pretty straightforward to use t
 
 ## Usage
 
-Simply place the compiled `ISLE.EXE` and `LEGO1.DLL` into LEGO Island's install folder (usually `C:\Program Files\LEGO Island` or `C:\Program Files (x86)\LEGO Island`). Alternatively, LEGO Island can run from any directory as long as `ISLE.EXE` and `LEGO1.DLL` are in the same directory, and the registry keys (usually `HKEY_LOCAL_MACHINE\Software\Mindscape\LEGO Island` or `HKEY_LOCAL_MACHINE\Software\Wow6432Node\Mindscape\LEGO Island`) point to the correct location for the asset files.
+The simplest way to use the recompiled binaries is to swap the original executables (`ISLE.EXE`, `LEGO1.DLL`, and `CONFIG.EXE`) in LEGO Island's installation directory for the ones that you've built from this source code. By default, LEGO Island is installed to `C:\Program Files\LEGO Island` on 32-bit operating systems and `C:\Program Files (x86)\LEGO Island` on 64-bit operating systems.
+
+For advanced users, you can get LEGO Island to run from anywhere as long as `ISLE.EXE` and `LEGO1.DLL` are in the same directory and the `cdpath` and `diskpath` registry keys (usually found in `HKEY_LOCAL_MACHINE\Software\Mindscape\LEGO Island` on 32-bit operating systems and `HKEY_LOCAL_MACHINE\Software\Wow6432Node\Mindscape\LEGO Island` on 64-bit operating systems) point to the correct location for the asset files (the directory that contains the `LEGO` folder).
+
+If you see an error about `d3drm.dll`, you will need to acquire a copy and place it in the same directory as the game executables, as it has not shipped with Windows since Windows XP. We have published a [known good copy here](https://legoisland.org/download/d3drm.zip) that works with LEGO Island.
 
 ## Contributing