The Wonderland Board

I'd like to use custom colours in my level, so I used custom texture on gates, transporters and conveyors. I tried the same on a button, but it doesn't work, default texture is used instead. Is there any way to use custom coloured buttons without replacing the original cvuupot#.wdf files in Data/Graphics?

Not that I know of. There's hex-edited buttons but they still take graphics from the files.