So, I finaly used this to create my own custom kernel theme using the theme from @Nona_Elexis as a base. To be fair, the default EZ-Flash Omega theme was very clean to begin with, so I never had the urge to modify it. But I liked the theme so much and just felt like it would be perfect, if only it was orange to fit both my GBA and my EZ-Flash Omega Shell. All it took was GIMPs hue/saturation tool to change the hue of the header