Im having the same issue. None of the directories allow me to access the ROMS partition at all. Which means I have no way of adding roms or emulators to the device. Also when I try to take the SD card out of the device and hook it up to a computer directly, I cant edit it, because it isnt formatted correctly. So all I can do is add stuff to the ROMS partition and then have the device not even recognize it.
Also the solution you suggested just doesnt work for me. When I go to Gmenu2X, there arent many options at all. There is only
"language
last selection
global volume
output logs
TV-out encoding"
Those are the only options. There is no emulators section. And even if there was, I dont know if it would even let me access the ROMS partition, since nothing else seems to.