No clue what ziPhone is but you'll need SSH and BSD installed on your iPhone.
You can do one of two things, get a cartridge copier and copy the games you own to disk, or google nes roms.
Once you have the roms they need to be placed in /var/root/media/roms/nes Using an SSH program like cyberduck connect to the iphone's wifi ip address: L: root P: alpine
Same process goes for SNES4iPhone and PSX4ALL