HElio,
If they have 1G in their serial number they are most likely 1Gigabit=128MB, so I think your problem stems from the fact that your players are hacked so the first thing you need to do is remove the hack that makes them read as 8GB.
Try this
http://www.mympxplayer.org/wanted-ha...rs-vt1864.html
Once you have done that I suggest resetting your players as described in the Dead Player Recovery Guide
http://www.mympxplayer.org/dead-play...ide-vt567.html
Then start reloading firmware again.