the last version of No$gba (2.6) has a new option on the lower part of the insert cartridge window...in which you can choose whether you want to emulate the game in a diferent "machine" (in this case....each of the windows when you choose link option) i haven't tested it ><...because all my gba roms were deleted T_T...btw...it doesn't work with NDS roms...hope this helps! =]