Don't use that, is not maintained, just kept because someone can still use it, to don't drop it, but that's the only reason.
Try if you wish the new radio button that's already installed with a normal installation of bgracontrols (BGRA Themes tab), and hopefully it has no leaks as well
With BGRA Themes you can use bitmaps like in the bgracustomdrawn, just you need to create a custom bitmap theme, that's all.