The Japanese blog 続・日々の生活 features Simple Black Renaissance Skin. It is designed for v5.x and above clients. For v4.x clients, you can just delete minimap.tga from the skin folder to revert to v4.x default minimap skin.
- Unzip the file into Granado Espada\release\user\skin folder.
- Start the game launcher, and click Config button.
- Tick Enable User Skin and click Save.
- Start the game client.