Neko ProjectX is a PC-98 emulator for Xbox (it is a port of the emulator Neko Project II). The PC-98 is a family of Japanese computers, they can have a hard disk and 2 floppy disks units, so this can appear to be a bit complicated to use... but I have made this emulator very simple, so that you don't need to know much things about this machine to be able to play: simply select your game in the rom list, and play. Also, I have replaced the drop-down menu of the original emulator, by a main menu and some shortcuts, more comfortable to manage with a joypad.
I have recompiled a new version with a limit of 1000 roms. In the future I must add the 4096 limit suggested by Madmab, but I must test it first. On the other hand, I tested 1000 roms in DesmumeX launcher and it worked, so I think that we can use it confidently
Attached is the default.xbe launcher that supports up to 1000 roms. Simply unrar it and overwrite the old default.xbe with this new one.