diff --git a/README.md b/README.md
index aeff1fd..951a35f 100644
--- a/README.md
+++ b/README.md
@@ -202,22 +202,25 @@ Coming Soon...
 
 The GUECS system is mostly defined in these four files:
 
-`guecs.hpp`
+`guecs/guecs.hpp`
 : This defines the base `guecs::UI` class which is a simple mostly template class that handles everything.  Most of the template functions are used to perform the ECS style operations like `set<TYPE>(id, VALUE)` to set a specific component `TYPE` to a `VALUE` at the given cell `id` from LEL.
 
-`guecs.cpp`
+`guecs/guecs.cpp`
 : Implementation for `guecs::UI` that aren't template based.  Main functions here are
 `guecs::UI::init()` and `guecs::UI::render()` which do the majority of the heavy lifting.  If you're
 looking to retarget GUECS to your game engine or graphics system then this is where to start.
 
-`sfml/components.hpp`
+`guecs/sfml/components.hpp`
 : This is where the SFML based components live.  This is where you find `Rectangle`, `Textual`,
 `Label`, and `Clickable` among other things.  If you're looking to retarget, then this is what you
 have to write for your system.
 
-`sfml/components.cpp`
+`guecs/sfml/components.cpp`
 : The implementations for the components, which is mostly just `init`, `update`, and `render` methods.
 
+`guecs/sfml/backend.cpp`
+: I'm using my own sprite, sound, and shader loading code but you probably don't want that. Look at this file then write you own versions of these functions. You then call `guecs::init(&my_backend)`.  Look in `demos/calc.cpp` for how this is done.
+
 ### GUECS Design Theme
 
 The overall design theme for the `guecs::UI` is this:
@@ -249,8 +252,8 @@ Give it a shot and soon I'll have a guide on how to do it.
 
 ### Fun Features
 
-1. Look at `guecs::Sound` (in `sfml/components.hpp`) to see how you can add sound feedback to your UI.
-2. Look at `guecs::Effect` (in `sfml/components.hpp`) to see how to apply shaders to your UI.  Keep in mind that I don't know a damn thing about shaders.
+1. Look at `guecs::Sound` (in `guecs/sfml/components.hpp`) to see how you can add sound feedback to your UI.
+2. Look at `guecs::Effect` (in `guecs/sfml/components.hpp`) to see how to apply shaders to your UI.  Keep in mind that I don't know a damn thing about shaders.
 
 ## RPN Calculator Demo