Like shinigati said, you need to copy the game manually.
WUP installer to FAT32 USB is currently not working (it installs only 0 byte files)
so, you need to copy the "usr" folder to the root of your USB to let mocha mount the partition as a WiiU HDD format.
then you can copy loadiine format to the usr's title folder (like if WUP installed did it)
Someone tried, but it didn't work. I guess it's still missing the ticket installation process.
the ticket needs to be installed to internal (NAND) to be able to launch the game.
so, it's tricky for the moment, it's only a beta/incomplete project that dimok released because he doesn't have time to complete it right now.
he might comes back and complete it later.
I guess the workaround for the moment is installing the game with WUP installer to fat32 usb then replace all the 0 bytes files manually on computer with extracted file format.
Edit:
I updated/fixed the first post a little. (which was my guide I wrote on another thread, you mostly copied it).