I have plans for it. Follow me on twitter for any news.
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Yes, that's the way. The mirroring is Horizontal.
For more info take a look here: http://forums.nesdev.com/viewtopic.php?f=28&t=18883 and here: https://wiki.nesdev.com/w/index.php/INES_Mapper_180.
Another option is to install this module: https://github.com/ClusterM/retroarch-clover , it's will run the game on another emulator and will probably work.