Using a wireless network to send gigs of data is pretty stupid. Even a wired network isn't fast enough for CHD and LD games. Hard drives are so cheap now that the time spent thinking about the decision to buy one costs more ;-) For example locally I can buy a 1TB drive for $59. Its much simpler and faster to just use an extra hard drive in each computer and duplicate the data (i.e ROMs) on each one but set the save/high score dir (via mame.ini) to the NAS. Then there's no delay and you can play whatever game you want including CHD and LD games and the high scores will be shared.