Amusingly enough, all of the low-level hardware access stuff in hakchi2 seems to be done through Windows ports of various Linux-based libraries and tools. The Windows drivers are just there to emulate the normal Linux APIs for low-level USB access. In principle, it would be possible to just chop out all the layers of emulation and drop in the original Linux USB access library using the actual Linux APIs (compiled as a Wine-style DLL so the Windows code could use it) and everything should work fine.