I can't get Pokémon Black to work either. When I try to run the ROM, it freezes at this point:
These are the cheats I have right now:
The cheat that gets past the "Cannot save game" screen and allows the game to start:
52004EA0 E8BD01F0
02004EA0 EAFFF25C
E2001800 0000005C
E92D4008 E3A00000...