Update README.md

Added details about the <setname same_dir="1"> option.

Author: RGarciaLago

README.md

@@ -19,8 +19,11 @@ Once you've installed the MGL files you can launch them like you would any other
 
 Additional notes:
 * These core shortcuts are MGL files that use the `<setname>` option.
-* MiSTer will treat these core shortcuts as a new core but will need folders named the same as the `<setname>`.
-* You can rename the `<setname>` but if you do after the config files are created you'll need to manually rename them to keep the same settings.
+  * MiSTer will treat these core shortcuts as a new core and create config files and folders named the same as the `<setname>`.
+  * You can rename the `<setname>` but if you do after the config files are created you'll need to manually rename them to keep the same settings.
+* Some of the core shortcut MGL files use the `<setname same_dir="1">` option instead.
+ * This will still create new config files named the same as the `<setname>` but will utilize the original core's folders.
+ * Like with `<setname>`, you can rename the `<setname same_dir="1">` but it will create new config files with those names and not copy your prior settings over.
 * Use your [names.txt file](https://github.com/ThreepwoodLeBrush/Names_MiSTer) to change the name of the MGL files so they show up how you prefer.
 * You can use [symbolic links](https://www.howtogeek.com/howto/16226/complete-guide-to-symbolic-links-symlinks-on-windows-or-linux/) to avoid file duplication if you wish to keep all games in the original core's folder.