Tell us about yourself!
Nobody replied this whole time?? The "Emulation Station" as it were will only show emulators for games you've loaded. If you want to see the other emulators listed in the menu you need to add ROMs to those folders. (ex. GBA will show up once you add GBA ROMs to the GBA folder)
the printer the author was using in this very instructable is actually extremely similar to yours. It should fit just fine.